206620156464 has 40 divisors (see below), whose sum is σ = 537168558000. Its totient is φ = 68434699008.

The previous prime is 206620156459. The next prime is 206620156489. The reversal of 206620156464 is 464651026602.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13701339 + ... + 13716410.

It is an arithmetic number, because the mean of its divisors is an integer number (13429213950).

Almost surely, 2^206620156464 is an apocalyptic number.

206620156464 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

206620156464 is an abundant number, since it is smaller than the sum of its proper divisors (330548401536).

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

206620156464 is a wasteful number, since it uses less digits than its factorization.

206620156464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27417917 (or 27417911 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 42.

The spelling of 206620156464 in words is "two hundred six billion, six hundred twenty million, one hundred fifty-six thousand, four hundred sixty-four".