621105520672 has 96 divisors (see below), whose sum is σ = 1505379762432. Its totient is φ = 245647862784.

The previous prime is 621105520657. The next prime is 621105520681. The reversal of 621105520672 is 276025501126.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12009493 + ... + 12061099.

It is an arithmetic number, because the mean of its divisors is an integer number (15681039192).

Almost surely, 2^621105520672 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 621105520672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (752689881216).

621105520672 is an abundant number, since it is smaller than the sum of its proper divisors (884274241760).

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

621105520672 is a wasteful number, since it uses less digits than its factorization.

621105520672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55770 (or 55762 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 37.

The spelling of 621105520672 in words is "six hundred twenty-one billion, one hundred five million, five hundred twenty thousand, six hundred seventy-two".