621452899990 has 32 divisors (see below), whose sum is σ = 1204717872960. Its totient is φ = 229448993664.

The previous prime is 621452899957. The next prime is 621452900009. The reversal of 621452899990 is 99998254126.

621452899990 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3088647 + ... + 3283693.

It is an arithmetic number, because the mean of its divisors is an integer number (37647433530).

Almost surely, 2^621452899990 is an apocalyptic number.

621452899990 is a deficient number, since it is larger than the sum of its proper divisors (583264972970).

621452899990 is a wasteful number, since it uses less digits than its factorization.

621452899990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219576.

The product of its (nonzero) digits is 25194240, while the sum is 64.

The spelling of 621452899990 in words is "six hundred twenty-one billion, four hundred fifty-two million, eight hundred ninety-nine thousand, nine hundred ninety".