620864772628860 has 72 divisors (see below), whose sum is σ = 1883300219223696. Its totient is φ = 165563024298240.

The previous prime is 620864772628829. The next prime is 620864772628861. The reversal of 620864772628860 is 68826277468026.

620864772628860 is a `hidden beast` number, since 6 + 208 + 64 + 7 + 7 + 26 + 288 + 60 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620864772628861) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23441947 + ... + 42323213.

It is an arithmetic number, because the mean of its divisors is an integer number (26156947489218).

Almost surely, 2^{620864772628860} is an apocalyptic number.

620864772628860 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

620864772628860 is an abundant number, since it is smaller than the sum of its proper divisors (1262435446594836).

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

620864772628860 is a wasteful number, since it uses less digits than its factorization.

620864772628860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19063963 (or 19063958 counting only the distinct ones).

The product of its (nonzero) digits is 1040449536, while the sum is 72.

The spelling of 620864772628860 in words is "six hundred twenty trillion, eight hundred sixty-four billion, seven hundred seventy-two million, six hundred twenty-eight thousand, eight hundred sixty".