621670276672 has 56 divisors (see below), whose sum is σ = 1288345562496. Its totient is φ = 297070507008.

The previous prime is 621670276663. The next prime is 621670276673. The reversal of 621670276672 is 276672076126.

621670276672 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (621670276673) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1579093 + ... + 1933099.

Almost surely, 2^621670276672 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 621670276672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (644172781248).

621670276672 is an abundant number, since it is smaller than the sum of its proper divisors (666675285824).

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

621670276672 is a wasteful number, since it uses less digits than its factorization.

621670276672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355235 (or 355225 counting only the distinct ones).

The product of its (nonzero) digits is 3556224, while the sum is 52.

The spelling of 621670276672 in words is "six hundred twenty-one billion, six hundred seventy million, two hundred seventy-six thousand, six hundred seventy-two".