621045340644366 has 24 divisors (see below), whose sum is σ = 1467925350614424. Its totient is φ = 188195557770960.

The previous prime is 621045340644353. The next prime is 621045340644383. The reversal of 621045340644366 is 663446043540126.

621045340644366 is a `hidden beast` number, since 6 + 2 + 1 + 0 + 4 + 534 + 0 + 6 + 4 + 43 + 66 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1568296314561 + ... + 1568296314956.

It is an arithmetic number, because the mean of its divisors is an integer number (61163556275601).

Almost surely, 2^{621045340644366} is an apocalyptic number.

621045340644366 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

621045340644366 is an abundant number, since it is smaller than the sum of its proper divisors (846880009970058).

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

621045340644366 is a wasteful number, since it uses less digits than its factorization.

621045340644366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3136592629536 (or 3136592629533 counting only the distinct ones).

The product of its (nonzero) digits is 29859840, while the sum is 54.

The spelling of 621045340644366 in words is "six hundred twenty-one trillion, forty-five billion, three hundred forty million, six hundred forty-four thousand, three hundred sixty-six".