36637646356 has 24 divisors (see below), whose sum is σ = 68343042600. Its totient is φ = 17125527552.

The previous prime is 36637646351. The next prime is 36637646387. The reversal of 36637646356 is 65364673663.

It can be written as a sum of positive squares in 4 ways, for example, as 13264128900 + 23373517456 = 115170^2 + 152884^2 .

It is a junction number, because it is equal to n+sod(n) for n = 36637646297 and 36637646306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36637646351) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1797885 + ... + 1818148.

It is an arithmetic number, because the mean of its divisors is an integer number (2847626775).

Almost surely, 2^36637646356 is an apocalyptic number.

It is an amenable number.

36637646356 is a deficient number, since it is larger than the sum of its proper divisors (31705396244).

36637646356 is a wasteful number, since it uses less digits than its factorization.

36637646356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3616203 (or 3616201 counting only the distinct ones).

The product of its digits is 29393280, while the sum is 55.

The spelling of 36637646356 in words is "thirty-six billion, six hundred thirty-seven million, six hundred forty-six thousand, three hundred fifty-six".