636450745854 has 32 divisors (see below), whose sum is σ = 1586994068736. Its totient is φ = 165311881920.

The previous prime is 636450745849. The next prime is 636450745859. The reversal of 636450745854 is 458547054636.

It is an interprime number because it is at equal distance from previous prime (636450745849) and next prime (636450745859).

It is a super-2 number, since 2×636450745854² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 636450745794 and 636450745803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (636450745859) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 688799047 + ... + 688799970.

It is an arithmetic number, because the mean of its divisors is an integer number (49593564648).

Almost surely, 2^636450745854 is an apocalyptic number.

636450745854 is an abundant number, since it is smaller than the sum of its proper divisors (950543322882).

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

636450745854 is a wasteful number, since it uses less digits than its factorization.

636450745854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1377599040.

The product of its (nonzero) digits is 48384000, while the sum is 57.

The spelling of 636450745854 in words is "six hundred thirty-six billion, four hundred fifty million, seven hundred forty-five thousand, eight hundred fifty-four".