621262652064 has 24 divisors (see below), whose sum is σ = 1630814461920. Its totient is φ = 207087550656.

The previous prime is 621262652027. The next prime is 621262652077. The reversal of 621262652064 is 460256262126.

It is a tau number, because it is divible by the number of its divisors (24).

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, 3235742884 + ... + 3235743075.

It is an arithmetic number, because the mean of its divisors is an integer number (67950602580).

Almost surely, 2^621262652064 is an apocalyptic number.

It is an amenable number.

621262652064 is an abundant number, since it is smaller than the sum of its proper divisors (1009551809856).

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

621262652064 is a wasteful number, since it uses less digits than its factorization.

621262652064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6471485972 (or 6471485964 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 42.

The spelling of 621262652064 in words is "six hundred twenty-one billion, two hundred sixty-two million, six hundred fifty-two thousand, sixty-four".