636023694645 has 256 divisors, whose sum is σ = 1258479452160. Its totient is φ = 303755443200.

The previous prime is 636023694629. The next prime is 636023694671. The reversal of 636023694645 is 546496320636.

636023694645 is a `hidden beast` number, since 6 + 360 + 236 + 9 + 4 + 6 + 45 = 666.

It is not a de Polignac number, because 636023694645 - 2⁴ = 636023694629 is a prime.

It is a super-2 number, since 2×636023694645² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 636023694591 and 636023694600.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 329374330 + ... + 329376260.

It is an arithmetic number, because the mean of its divisors is an integer number (4915935360).

Almost surely, 2^636023694645 is an apocalyptic number.

It is an amenable number.

636023694645 is a deficient number, since it is larger than the sum of its proper divisors (622455757515).

636023694645 is a wasteful number, since it uses less digits than its factorization.

636023694645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2113 (or 2107 counting only the distinct ones).

The product of its (nonzero) digits is 16796160, while the sum is 54.

The spelling of 636023694645 in words is "six hundred thirty-six billion, twenty-three million, six hundred ninety-four thousand, six hundred forty-five".