345728756638 has 8 divisors (see below), whose sum is σ = 522324021240. Its totient is φ = 171620749560.

The previous prime is 345728756621. The next prime is 345728756683. The reversal of 345728756638 is 836657827543.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 345728756638.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 621814033 + ... + 621814588.

It is an arithmetic number, because the mean of its divisors is an integer number (65290502655).

Almost surely, 2^345728756638 is an apocalyptic number.

345728756638 is a deficient number, since it is larger than the sum of its proper divisors (176595264602).

345728756638 is a wasteful number, since it uses less digits than its factorization.

345728756638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1243628762.

The product of its digits is 203212800, while the sum is 64.

The spelling of 345728756638 in words is "three hundred forty-five billion, seven hundred twenty-eight million, seven hundred fifty-six thousand, six hundred thirty-eight".