36641644728 has 32 divisors (see below), whose sum is σ = 98650582800. Its totient is φ = 11274352128.

The previous prime is 36641644703. The next prime is 36641644729. The reversal of 36641644728 is 82744614663.

It is a super-2 number, since 2×36641644728² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36641644729) 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, 58720273 + ... + 58720896.

Almost surely, 2^36641644728 is an apocalyptic number.

It is an amenable number.

36641644728 is an abundant number, since it is smaller than the sum of its proper divisors (62008938072).

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

36641644728 is a wasteful number, since it uses less digits than its factorization.

36641644728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117441191 (or 117441187 counting only the distinct ones).

The product of its digits is 4644864, while the sum is 51.

The spelling of 36641644728 in words is "thirty-six billion, six hundred forty-one million, six hundred forty-four thousand, seven hundred twenty-eight".