123664126455 has 12 divisors (see below), whose sum is σ = 214351152600. Its totient is φ = 65954200752.

The previous prime is 123664126451. The next prime is 123664126459. The reversal of 123664126455 is 554621466321.

123664126455 is a `hidden beast` number, since 12 + 3 + 6 + 64 + 126 + 455 = 666.

It is an interprime number because it is at equal distance from previous prime (123664126451) and next prime (123664126459).

It is not a de Polignac number, because 123664126455 - 2² = 123664126451 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 2748091699 = 123664126455 / (1 + 2 + 3 + 6 + 6 + 4 + 1 + 2 + 6 + 4 + 5 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 123664126455.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123664126451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1374045805 + ... + 1374045894.

It is an arithmetic number, because the mean of its divisors is an integer number (17862596050).

Almost surely, 2^123664126455 is an apocalyptic number.

123664126455 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

123664126455 is a deficient number, since it is larger than the sum of its proper divisors (90687026145).

123664126455 is a wasteful number, since it uses less digits than its factorization.

123664126455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2748091710 (or 2748091707 counting only the distinct ones).

The product of its digits is 1036800, while the sum is 45.

The spelling of 123664126455 in words is "one hundred twenty-three billion, six hundred sixty-four million, one hundred twenty-six thousand, four hundred fifty-five".