345720029172 has 48 divisors (see below), whose sum is σ = 921949163520. Its totient is φ = 98774034912.

The previous prime is 345720029143. The next prime is 345720029233. The reversal of 345720029172 is 271920027543.

It is a Harshad number since it is a multiple of its sum of digits (42).

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 15 ways as a sum of consecutive naturals, for example, 4579113 + ... + 4653999.

It is an arithmetic number, because the mean of its divisors is an integer number (19207274240).

Almost surely, 2^345720029172 is an apocalyptic number.

It is an amenable number.

345720029172 is an abundant number, since it is smaller than the sum of its proper divisors (576229134348).

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

345720029172 is a wasteful number, since it uses less digits than its factorization.

345720029172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129860 (or 129858 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 42.

The spelling of 345720029172 in words is "three hundred forty-five billion, seven hundred twenty million, twenty-nine thousand, one hundred seventy-two".