36604561421 has 4 divisors (see below), whose sum is σ = 37497355644. Its totient is φ = 35711767200.

The previous prime is 36604561417. The next prime is 36604561451. The reversal of 36604561421 is 12416540663.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12416540663 = 1621 ⋅7659803.

It can be written as a sum of positive squares in 2 ways, for example, as 5482662025 + 31121899396 = 74045^2 + 176414^2 .

It is a cyclic number.

It is not a de Polignac number, because 36604561421 - 2² = 36604561417 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 (36604561451) 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, 446397050 + ... + 446397131.

It is an arithmetic number, because the mean of its divisors is an integer number (9374338911).

Almost surely, 2^36604561421 is an apocalyptic number.

It is an amenable number.

36604561421 is a deficient number, since it is larger than the sum of its proper divisors (892794223).

36604561421 is an equidigital number, since it uses as much as digits as its factorization.

36604561421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 892794222.

The product of its (nonzero) digits is 103680, while the sum is 38.

The spelling of 36604561421 in words is "thirty-six billion, six hundred four million, five hundred sixty-one thousand, four hundred twenty-one".