621064536 has 64 divisors (see below), whose sum is σ = 1688467680. Its totient is φ = 189573120.

The previous prime is 621064513. The next prime is 621064537. The reversal of 621064536 is 635460126.

It is a junction number, because it is equal to n+sod(n) for n = 621064497 and 621064506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621064537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5475 + ... + 35666.

Almost surely, 2^621064536 is an apocalyptic number.

It is an amenable number.

621064536 is an abundant number, since it is smaller than the sum of its proper divisors (1067403144).

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

621064536 is a wasteful number, since it uses less digits than its factorization.

621064536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41204 (or 41200 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 33.

The square root of 621064536 is about 24921.1664253502. The cubic root of 621064536 is about 853.1896471668.

The spelling of 621064536 in words is "six hundred twenty-one million, sixty-four thousand, five hundred thirty-six".