163636400634 has 64 divisors (see below), whose sum is σ = 376898870016. Its totient is φ = 46394417664.

The previous prime is 163636400623. The next prime is 163636400671. The reversal of 163636400634 is 436004636361.

It is a super-2 number, since 2×163636400634² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26678232 + ... + 26684364.

It is an arithmetic number, because the mean of its divisors is an integer number (5889044844).

Almost surely, 2^163636400634 is an apocalyptic number.

163636400634 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

163636400634 is an abundant number, since it is smaller than the sum of its proper divisors (213262469382).

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

163636400634 is a wasteful number, since it uses less digits than its factorization.

163636400634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10919.

The product of its (nonzero) digits is 559872, while the sum is 42.

The spelling of 163636400634 in words is "one hundred sixty-three billion, six hundred thirty-six million, four hundred thousand, six hundred thirty-four".