620685650421 has 32 divisors (see below), whose sum is σ = 1015956069120. Its totient is φ = 372517212672.

The previous prime is 620685650401. The next prime is 620685650423. The reversal of 620685650421 is 124056586026.

620685650421 is a `hidden beast` number, since 6 + 2 + 0 + 68 + 565 + 0 + 4 + 21 = 666.

It is not a de Polignac number, because 620685650421 - 2²⁵ = 620652095989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620685650423) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29386320 + ... + 29407433.

It is an arithmetic number, because the mean of its divisors is an integer number (31748627160).

Almost surely, 2^620685650421 is an apocalyptic number.

It is an amenable number.

620685650421 is a deficient number, since it is larger than the sum of its proper divisors (395270418699).

620685650421 is a wasteful number, since it uses less digits than its factorization.

620685650421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58793802 (or 58793796 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 45.

The spelling of 620685650421 in words is "six hundred twenty billion, six hundred eighty-five million, six hundred fifty thousand, four hundred twenty-one".