36659915645 has 6 divisors (see below), whose sum is σ = 43992412542. Its totient is φ = 29327590008.

The previous prime is 36659915641. The next prime is 36659915653. The reversal of 36659915645 is 54651995663.

It can be written as a sum of positive squares in only one way, i.e., 29327932516 + 7331983129 = 171254^2 + 85627^2 .

It is not a de Polignac number, because 36659915645 - 2² = 36659915641 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36659915641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 385322 + ... + 470948.

It is an arithmetic number, because the mean of its divisors is an integer number (7332068757).

Almost surely, 2^36659915645 is an apocalyptic number.

It is an amenable number.

36659915645 is a deficient number, since it is larger than the sum of its proper divisors (7332496897).

36659915645 is an frugal number, since it uses more digits than its factorization.

36659915645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171259 (or 85632 counting only the distinct ones).

The product of its digits is 26244000, while the sum is 59.

The spelling of 36659915645 in words is "thirty-six billion, six hundred fifty-nine million, nine hundred fifteen thousand, six hundred forty-five".