621339639002 has 8 divisors (see below), whose sum is σ = 932129694516. Its totient is φ = 310629740832.

The previous prime is 621339638989. The next prime is 621339639023. The reversal of 621339639002 is 200936933126.

It is a Cunningham number, because it is equal to 788251²+1.

It can be written as a sum of positive squares in 2 ways, for example, as 621339639001 + 1 = 788251^2 + 1^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20019953 + ... + 20050964.

Almost surely, 2^621339639002 is an apocalyptic number.

621339639002 is a deficient number, since it is larger than the sum of its proper divisors (310790055514).

621339639002 is a wasteful number, since it uses less digits than its factorization.

621339639002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40078672.

The product of its (nonzero) digits is 314928, while the sum is 44.

The spelling of 621339639002 in words is "six hundred twenty-one billion, three hundred thirty-nine million, six hundred thirty-nine thousand, two".