621675819072 has 672 divisors, whose sum is σ = 2314979896320. Its totient is φ = 160698193920.

The previous prime is 621675819071. The next prime is 621675819077. The reversal of 621675819072 is 270918576126.

621675819072 is a `hidden beast` number, since 621 + 6 + 7 + 5 + 8 + 1 + 9 + 0 + 7 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (672).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (621675819071) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 274227283 + ... + 274229549.

It is an arithmetic number, because the mean of its divisors is an integer number (3444910560).

Almost surely, 2^621675819072 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 621675819072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1157489948160).

621675819072 is an abundant number, since it is smaller than the sum of its proper divisors (1693304077248).

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

621675819072 is a wasteful number, since it uses less digits than its factorization.

621675819072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2541 (or 2519 counting only the distinct ones).

The product of its (nonzero) digits is 2540160, while the sum is 54.

The spelling of 621675819072 in words is "six hundred twenty-one billion, six hundred seventy-five million, eight hundred nineteen thousand, seventy-two".