345721560399 has 16 divisors (see below), whose sum is σ = 513186357600. Its totient is φ = 230028219648.

The previous prime is 345721560383. The next prime is 345721560467. The reversal of 345721560399 is 993065127543.

345721560399 is a `hidden beast` number, since 3 + 4 + 5 + 7 + 21 + 5 + 603 + 9 + 9 = 666.

It is not a de Polignac number, because 345721560399 - 2⁴ = 345721560383 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (345721560329) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12564354 + ... + 12591839.

It is an arithmetic number, because the mean of its divisors is an integer number (32074147350).

Almost surely, 2^345721560399 is an apocalyptic number.

345721560399 is a deficient number, since it is larger than the sum of its proper divisors (167464797201).

345721560399 is a wasteful number, since it uses less digits than its factorization.

345721560399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25156711 (or 25156705 counting only the distinct ones).

The product of its (nonzero) digits is 6123600, while the sum is 54.

The spelling of 345721560399 in words is "three hundred forty-five billion, seven hundred twenty-one million, five hundred sixty thousand, three hundred ninety-nine".