36531691157 has 18 divisors (see below), whose sum is σ = 39697967106. Its totient is φ = 33602643360.

The previous prime is 36531691129. The next prime is 36531691171. The reversal of 36531691157 is 75119613563.

It can be written as a sum of positive squares in 3 ways, for example, as 810313156 + 35721378001 = 28466^2 + 189001^2 .

It is not a de Polignac number, because 36531691157 - 2¹² = 36531687061 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 (36531691117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 18514823 + ... + 18516795.

It is an arithmetic number, because the mean of its divisors is an integer number (2205442617).

Almost surely, 2^36531691157 is an apocalyptic number.

It is an amenable number.

36531691157 is a deficient number, since it is larger than the sum of its proper divisors (3166275949).

36531691157 is an equidigital number, since it uses as much as digits as its factorization.

36531691157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2661 (or 2317 counting only the distinct ones).

The product of its digits is 510300, while the sum is 47.

The spelling of 36531691157 in words is "thirty-six billion, five hundred thirty-one million, six hundred ninety-one thousand, one hundred fifty-seven".