36522400644 has 18 divisors (see below), whose sum is σ = 92320512830. Its totient is φ = 12174133536.

The previous prime is 36522400597. The next prime is 36522400661. The reversal of 36522400644 is 44600422563.

36522400644 is a `hidden beast` number, since 3 + 6 + 5 + 2 + 2 + 4 + 0 + 0 + 644 = 666.

It can be written as a sum of positive squares in only one way, i.e., 23001362244 + 13521038400 = 151662^2 + 116280^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×36522400644² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 1014511129 = 36522400644 / (3 + 6 + 5 + 2 + 2 + 4 + 0 + 0 + 6 + 4 + 4).

It is a junction number, because it is equal to n+sod(n) for n = 36522400599 and 36522400608.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 507255529 + ... + 507255600.

Almost surely, 2^36522400644 is an apocalyptic number.

It is an amenable number.

36522400644 is an abundant number, since it is smaller than the sum of its proper divisors (55798112186).

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

36522400644 is a wasteful number, since it uses less digits than its factorization.

36522400644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1014511139 (or 1014511134 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 36.

The spelling of 36522400644 in words is "thirty-six billion, five hundred twenty-two million, four hundred thousand, six hundred forty-four".