636346881151 has 4 divisors (see below), whose sum is σ = 638170225000. Its totient is φ = 634523537304.

The previous prime is 636346881139. The next prime is 636346881161. The reversal of 636346881151 is 151188643636.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 636346881151 - 2¹⁷ = 636346750079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (636346881161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 911671401 + ... + 911672098.

It is an arithmetic number, because the mean of its divisors is an integer number (159542556250).

Almost surely, 2^636346881151 is an apocalyptic number.

636346881151 is a deficient number, since it is larger than the sum of its proper divisors (1823343849).

636346881151 is a wasteful number, since it uses less digits than its factorization.

636346881151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1823343848.

The product of its digits is 2488320, while the sum is 52.

The spelling of 636346881151 in words is "six hundred thirty-six billion, three hundred forty-six million, eight hundred eighty-one thousand, one hundred fifty-one".