621479964672 has 156 divisors (see below), whose sum is σ = 2051620738960. Its totient is φ = 177565630464.

The previous prime is 621479964647. The next prime is 621479964689. The reversal of 621479964672 is 276469974126.

It is a happy number.

621479964672 is a `hidden beast` number, since 6 + 2 + 1 + 479 + 96 + 4 + 6 + 72 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 946147 + ... + 1462242.

Almost surely, 2^621479964672 is an apocalyptic number.

It is an amenable number.

621479964672 is an abundant number, since it is smaller than the sum of its proper divisors (1430140774288).

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

621479964672 is a wasteful number, since it uses less digits than its factorization.

621479964672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2408426 (or 2408401 counting only the distinct ones).

The product of its digits is 54867456, while the sum is 63.

The spelling of 621479964672 in words is "six hundred twenty-one billion, four hundred seventy-nine million, nine hundred sixty-four thousand, six hundred seventy-two".