36900409631 has 4 divisors (see below), whose sum is σ = 37800419664. Its totient is φ = 36000399600.

The previous prime is 36900409621. The next prime is 36900409633. The reversal of 36900409631 is 13690400963.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-36900409631 is a prime.

It is a super-2 number, since 2×36900409631² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (41), and also a Moran number because the ratio is a prime number: 900009991 = 36900409631 / (3 + 6 + 9 + 0 + 0 + 4 + 0 + 9 + 6 + 3 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36900409633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 450004955 + ... + 450005036.

It is an arithmetic number, because the mean of its divisors is an integer number (9450104916).

Almost surely, 2^36900409631 is an apocalyptic number.

36900409631 is a deficient number, since it is larger than the sum of its proper divisors (900010033).

36900409631 is an equidigital number, since it uses as much as digits as its factorization.

36900409631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 900010032.

The product of its (nonzero) digits is 104976, while the sum is 41.

The spelling of 36900409631 in words is "thirty-six billion, nine hundred million, four hundred nine thousand, six hundred thirty-one".