163388451656680 has 64 divisors (see below), whose sum is σ = 368673719192640. Its totient is φ = 65168775124992.

The previous prime is 163388451656671. The next prime is 163388451656693. The reversal of 163388451656680 is 86656154883361.

It is a super-2 number, since 2×163388451656680² (a number of 29 digits) contains 22 as substring.

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, 806249527 + ... + 806452153.

It is an arithmetic number, because the mean of its divisors is an integer number (5760526862385).

Almost surely, 2^{163388451656680} is an apocalyptic number.

163388451656680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

163388451656680 is an abundant number, since it is smaller than the sum of its proper divisors (205285267535960).

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

163388451656680 is a wasteful number, since it uses less digits than its factorization.

163388451656680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260098 (or 260094 counting only the distinct ones).

The product of its (nonzero) digits is 597196800, while the sum is 70.

The spelling of 163388451656680 in words is "one hundred sixty-three trillion, three hundred eighty-eight billion, four hundred fifty-one million, six hundred fifty-six thousand, six hundred eighty".