345520106523 has 12 divisors (see below), whose sum is σ = 503930081200. Its totient is φ = 228110360976.

The previous prime is 345520106513. The next prime is 345520106537. The reversal of 345520106523 is 325601025543.

345520106523 is a `hidden beast` number, since 3 + 4 + 5 + 5 + 20 + 106 + 523 = 666.

It is not a de Polignac number, because 345520106523 - 2¹⁰ = 345520105499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (345520106513) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 186363748 + ... + 186365601.

Almost surely, 2^345520106523 is an apocalyptic number.

345520106523 is a deficient number, since it is larger than the sum of its proper divisors (158409974677).

345520106523 is a wasteful number, since it uses less digits than its factorization.

345520106523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372729458 (or 372729455 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 36.

The spelling of 345520106523 in words is "three hundred forty-five billion, five hundred twenty million, one hundred six thousand, five hundred twenty-three".