36977631917 has 4 divisors (see below), whose sum is σ = 36978129276. Its totient is φ = 36977134560.

The previous prime is 36977631883. The next prime is 36977631959. The reversal of 36977631917 is 71913677963.

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

It can be written as a sum of positive squares in 2 ways, for example, as 18447344041 + 18530287876 = 135821^2 + 136126^2 .

It is a cyclic number.

It is not a de Polignac number, because 36977631917 - 2⁶ = 36977631853 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 (36977621917) 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, 112184 + ... + 294177.

It is an arithmetic number, because the mean of its divisors is an integer number (9244532319).

Almost surely, 2^36977631917 is an apocalyptic number.

It is an amenable number.

36977631917 is a deficient number, since it is larger than the sum of its proper divisors (497359).

36977631917 is an equidigital number, since it uses as much as digits as its factorization.

36977631917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 497358.

The product of its digits is 9001692, while the sum is 59.

The spelling of 36977631917 in words is "thirty-six billion, nine hundred seventy-seven million, six hundred thirty-one thousand, nine hundred seventeen".