36651290891 has 4 divisors (see below), whose sum is σ = 36975638712. Its totient is φ = 36326943072.

The previous prime is 36651290869. The next prime is 36651290953. The reversal of 36651290891 is 19809215663.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19809215663 = 331 ⋅59846573.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-36651290891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (36651290831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 162173741 + ... + 162173966.

It is an arithmetic number, because the mean of its divisors is an integer number (9243909678).

Almost surely, 2^36651290891 is an apocalyptic number.

36651290891 is a deficient number, since it is larger than the sum of its proper divisors (324347821).

36651290891 is a wasteful number, since it uses less digits than its factorization.

36651290891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324347820.

The product of its (nonzero) digits is 699840, while the sum is 50.

The spelling of 36651290891 in words is "thirty-six billion, six hundred fifty-one million, two hundred ninety thousand, eight hundred ninety-one".