636258252068 has 48 divisors (see below), whose sum is σ = 1184363570880. Its totient is φ = 298043725824.

The previous prime is 636258252061. The next prime is 636258252079. The reversal of 636258252068 is 860252852636.

It is not an unprimeable number, because it can be changed into a prime (636258252061) 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, 13019303 + ... + 13068081.

It is an arithmetic number, because the mean of its divisors is an integer number (24674241060).

Almost surely, 2^636258252068 is an apocalyptic number.

636258252068 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

636258252068 is a deficient number, since it is larger than the sum of its proper divisors (548105318812).

636258252068 is a wasteful number, since it uses less digits than its factorization.

636258252068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49676 (or 49674 counting only the distinct ones).

The product of its (nonzero) digits is 8294400, while the sum is 53.

The spelling of 636258252068 in words is "six hundred thirty-six billion, two hundred fifty-eight million, two hundred fifty-two thousand, sixty-eight".