621531547996 has 6 divisors (see below), whose sum is σ = 1087680209000. Its totient is φ = 310765773996.

The previous prime is 621531547961. The next prime is 621531547999. The reversal of 621531547996 is 699745135126.

It is a self number, because there is not a number n which added to its sum of digits gives 621531547996.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621531547999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77691443496 + ... + 77691443503.

Almost surely, 2^621531547996 is an apocalyptic number.

It is an amenable number.

621531547996 is a deficient number, since it is larger than the sum of its proper divisors (466148661004).

621531547996 is a wasteful number, since it uses less digits than its factorization.

621531547996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155382887003 (or 155382887001 counting only the distinct ones).

The product of its digits is 12247200, while the sum is 58.

The spelling of 621531547996 in words is "six hundred twenty-one billion, five hundred thirty-one million, five hundred forty-seven thousand, nine hundred ninety-six".