123115045562145 has 576 divisors, whose sum is σ = 275651083868160. Its totient is φ = 49479098572800.

The previous prime is 123115045562029. The next prime is 123115045562219. The reversal of 123115045562145 is 541265540511321.

123115045562145 is a `hidden beast` number, since 1 + 2 + 3 + 1 + 1 + 5 + 0 + 45 + 562 + 1 + 45 = 666.

It is not a de Polignac number, because 123115045562145 - 2¹⁸ = 123115045300001 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 123115045562145.

It is an unprimeable number.

It is a polite number, since it can be written in 575 ways as a sum of consecutive naturals, for example, 55432257135 + ... + 55432259355.

Almost surely, 2^{123115045562145} is an apocalyptic number.

123115045562145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

123115045562145 is an abundant number, since it is smaller than the sum of its proper divisors (152536038306015).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123115045562145 is a wasteful number, since it uses less digits than its factorization.

123115045562145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2498 (or 2442 counting only the distinct ones).

The product of its (nonzero) digits is 720000, while the sum is 45.

The spelling of 123115045562145 in words is "one hundred twenty-three trillion, one hundred fifteen billion, forty-five million, five hundred sixty-two thousand, one hundred forty-five".