36516565021 has 4 divisors (see below), whose sum is σ = 36524751552. Its totient is φ = 36508378492.

The previous prime is 36516565003. The next prime is 36516565031. The reversal of 36516565021 is 12056561563.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12056561563 = 137 ⋅88004099.

It is a cyclic number.

It is not a de Polignac number, because 36516565021 - 2⁵ = 36516564989 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 (36516565031) 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, 4086571 + ... + 4095496.

It is an arithmetic number, because the mean of its divisors is an integer number (9131187888).

Almost surely, 2^36516565021 is an apocalyptic number.

It is an amenable number.

36516565021 is a deficient number, since it is larger than the sum of its proper divisors (8186531).

36516565021 is an equidigital number, since it uses as much as digits as its factorization.

36516565021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8186530.

The product of its (nonzero) digits is 162000, while the sum is 40.

The spelling of 36516565021 in words is "thirty-six billion, five hundred sixteen million, five hundred sixty-five thousand, twenty-one".