634023320436 has 72 divisors (see below), whose sum is σ = 1840386693600. Its totient is φ = 182016262080.

The previous prime is 634023320347. The next prime is 634023320459.

634023320436 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 634023320436.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 42125871 + ... + 42140918.

It is an arithmetic number, because the mean of its divisors is an integer number (25560926300).

Almost surely, 2^634023320436 is an apocalyptic number.

634023320436 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

634023320436 is an abundant number, since it is smaller than the sum of its proper divisors (1206363373164).

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

634023320436 is a wasteful number, since it uses less digits than its factorization.

634023320436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84266829 (or 84266824 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 36.

It can be divided in two parts, 634023 and 320436, that added together give a palindrome (954459).

The spelling of 634023320436 in words is "six hundred thirty-four billion, twenty-three million, three hundred twenty thousand, four hundred thirty-six".