123665551413 has 8 divisors (see below), whose sum is σ = 164895409728. Its totient is φ = 82439697024.

The previous prime is 123665551409. The next prime is 123665551459. The reversal of 123665551413 is 314155566321.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 123665551413 - 2² = 123665551409 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123665551813) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 928156 + ... + 1052997.

It is an arithmetic number, because the mean of its divisors is an integer number (20611926216).

Almost surely, 2^123665551413 is an apocalyptic number.

It is an amenable number.

123665551413 is a deficient number, since it is larger than the sum of its proper divisors (41229858315).

123665551413 is a wasteful number, since it uses less digits than its factorization.

123665551413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2001963.

The product of its digits is 324000, while the sum is 42.

The spelling of 123665551413 in words is "one hundred twenty-three billion, six hundred sixty-five million, five hundred fifty-one thousand, four hundred thirteen".