636536057228 has 24 divisors (see below), whose sum is σ = 1184162961744. Its totient is φ = 298352960000.

The previous prime is 636536057197. The next prime is 636536057239. The reversal of 636536057228 is 822750635636.

It is a self number, because there is not a number n which added to its sum of digits gives 636536057228.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18629993 + ... + 18664128.

It is an arithmetic number, because the mean of its divisors is an integer number (49340123406).

Almost surely, 2^636536057228 is an apocalyptic number.

636536057228 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

636536057228 is a deficient number, since it is larger than the sum of its proper divisors (547626904516).

636536057228 is a wasteful number, since it uses less digits than its factorization.

636536057228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37294393 (or 37294391 counting only the distinct ones).

The product of its (nonzero) digits is 10886400, while the sum is 53.

The spelling of 636536057228 in words is "six hundred thirty-six billion, five hundred thirty-six million, fifty-seven thousand, two hundred twenty-eight".