636245057710081 has 8 divisors (see below), whose sum is σ = 653699272998240. Its totient is φ = 619013189113728.

The previous prime is 636245057710069. The next prime is 636245057710177. The reversal of 636245057710081 is 180017750542636.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-636245057710081 is a prime.

It is a super-2 number, since 2×636245057710081² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (636245057710061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55586667151 + ... + 55586678596.

It is an arithmetic number, because the mean of its divisors is an integer number (81712409124780).

Almost surely, 2^{636245057710081} is an apocalyptic number.

It is an amenable number.

636245057710081 is a deficient number, since it is larger than the sum of its proper divisors (17454215288159).

636245057710081 is a wasteful number, since it uses less digits than its factorization.

636245057710081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111173345903.

The product of its (nonzero) digits is 8467200, while the sum is 55.

The spelling of 636245057710081 in words is "six hundred thirty-six trillion, two hundred forty-five billion, fifty-seven million, seven hundred ten thousand, eighty-one".