621534660044 has 12 divisors (see below), whose sum is σ = 1090649378784. Its totient is φ = 309920551824.

The previous prime is 621534660023. The next prime is 621534660067. The reversal of 621534660044 is 440066435126.

It is a junction number, because it is equal to n+sod(n) for n = 621534659983 and 621534660010.

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, 211692899 + ... + 211695834.

It is an arithmetic number, because the mean of its divisors is an integer number (90887448232).

Almost surely, 2^621534660044 is an apocalyptic number.

It is an amenable number.

621534660044 is a deficient number, since it is larger than the sum of its proper divisors (469114718740).

621534660044 is a wasteful number, since it uses less digits than its factorization.

621534660044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423389104 (or 423389102 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 41.

The spelling of 621534660044 in words is "six hundred twenty-one billion, five hundred thirty-four million, six hundred sixty thousand, forty-four".