206631518974464 has 160 divisors (see below), whose sum is σ = 601662366429696. Its totient is φ = 62734426767360.

The previous prime is 206631518974457. The next prime is 206631518974501. The reversal of 206631518974464 is 464479815136602.

It is a junction number, because it is equal to n+sod(n) for n = 206631518974395 and 206631518974404.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 126824047 + ... + 128442990.

It is a 1-persistent number, because it is pandigital, but 2⋅206631518974464 = 413263037948928 is not.

Almost surely, 2^{206631518974464} is an apocalyptic number.

206631518974464 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

206631518974464 is an abundant number, since it is smaller than the sum of its proper divisors (395030847455232).

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

206631518974464 is a wasteful number, since it uses less digits than its factorization.

206631518974464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255267106 (or 255267090 counting only the distinct ones).

The product of its (nonzero) digits is 209018880, while the sum is 66.

The spelling of 206631518974464 in words is "two hundred six trillion, six hundred thirty-one billion, five hundred eighteen million, nine hundred seventy-four thousand, four hundred sixty-four".