621453674460 has 96 divisors (see below), whose sum is σ = 1765886234112. Its totient is φ = 163278662400.

The previous prime is 621453674453. The next prime is 621453674477. The reversal of 621453674460 is 64476354126.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 962235 + ... + 1472685.

It is an arithmetic number, because the mean of its divisors is an integer number (18394648272).

Almost surely, 2^621453674460 is an apocalyptic number.

621453674460 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 621453674460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (882943117056).

621453674460 is an abundant number, since it is smaller than the sum of its proper divisors (1144432559652).

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

621453674460 is a wasteful number, since it uses less digits than its factorization.

621453674460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510763 (or 510761 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 48.

The spelling of 621453674460 in words is "six hundred twenty-one billion, four hundred fifty-three million, six hundred seventy-four thousand, four hundred sixty".