621533897346 has 16 divisors (see below), whose sum is σ = 1243075545504. Its totient is φ = 207176673984.

The previous prime is 621533897339. The next prime is 621533897359. The reversal of 621533897346 is 643798335126.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1603306 + ... + 1952858.

It is an arithmetic number, because the mean of its divisors is an integer number (77692221594).

Almost surely, 2^621533897346 is an apocalyptic number.

621533897346 is an abundant number, since it is smaller than the sum of its proper divisors (621541648158).

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

621533897346 is a wasteful number, since it uses less digits than its factorization.

621533897346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 645905.

The product of its digits is 19595520, while the sum is 57.

The spelling of 621533897346 in words is "six hundred twenty-one billion, five hundred thirty-three million, eight hundred ninety-seven thousand, three hundred forty-six".