1551112123455 has 32 divisors (see below), whose sum is σ = 2919740472000. Its totient is φ = 778597456896.

The previous prime is 1551112123433. The next prime is 1551112123487. The reversal of 1551112123455 is 5543212111551.

1551112123455 is a `hidden beast` number, since 1 + 5 + 511 + 12 + 123 + 4 + 5 + 5 = 666.

It is not a de Polignac number, because 1551112123455 - 2⁵ = 1551112123423 is a prime.

It is a super-2 number, since 2×1551112123455² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 337930630 + ... + 337935219.

It is an arithmetic number, because the mean of its divisors is an integer number (91241889750).

Almost surely, 2^{1551112123455} is an apocalyptic number.

1551112123455 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1551112123455 is a deficient number, since it is larger than the sum of its proper divisors (1368628348545).

1551112123455 is a wasteful number, since it uses less digits than its factorization.

1551112123455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 675865880 (or 675865874 counting only the distinct ones).

The product of its digits is 30000, while the sum is 36.

The spelling of 1551112123455 in words is "one trillion, five hundred fifty-one billion, one hundred twelve million, one hundred twenty-three thousand, four hundred fifty-five".