621649549000 has 64 divisors (see below), whose sum is σ = 1454952011760. Its totient is φ = 248609894400.

The previous prime is 621649548991. The next prime is 621649549019. The reversal of 621649549000 is 945946126.

It can be written as a sum of positive squares in 8 ways, for example, as 23065711876 + 598583837124 = 151874^2 + 773682^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5137192 + ... + 5256808.

Almost surely, 2^621649549000 is an apocalyptic number.

It is an amenable number.

621649549000 is an abundant number, since it is smaller than the sum of its proper divisors (833302462760).

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

621649549000 is a wasteful number, since it uses less digits than its factorization.

621649549000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124835 (or 124821 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 46.

The spelling of 621649549000 in words is "six hundred twenty-one billion, six hundred forty-nine million, five hundred forty-nine thousand".