621434646315 has 48 divisors (see below), whose sum is σ = 1303446126528. Its totient is φ = 267373559808.

The previous prime is 621434646271. The next prime is 621434646389. The reversal of 621434646315 is 513646434126.

621434646315 is a `hidden beast` number, since 6 + 2 + 1 + 4 + 3 + 4 + 6 + 4 + 631 + 5 = 666.

It is not a de Polignac number, because 621434646315 - 2²³ = 621426257707 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 58018422 + ... + 58029131.

It is an arithmetic number, because the mean of its divisors is an integer number (27155127636).

Almost surely, 2^621434646315 is an apocalyptic number.

621434646315 is an abundant number, since it is smaller than the sum of its proper divisors (682011480213).

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

621434646315 is a wasteful number, since it uses less digits than its factorization.

621434646315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116047588 (or 116047585 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 45.

The spelling of 621434646315 in words is "six hundred twenty-one billion, four hundred thirty-four million, six hundred forty-six thousand, three hundred fifteen".