36551552621 has 4 divisors (see below), whose sum is σ = 36584692032. Its totient is φ = 36518413212.

The previous prime is 36551552591. The next prime is 36551552669. The reversal of 36551552621 is 12625515563.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-36551552621 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 (36551572621) 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, 16568051 + ... + 16570256.

It is an arithmetic number, because the mean of its divisors is an integer number (9146173008).

Almost surely, 2^36551552621 is an apocalyptic number.

It is an amenable number.

36551552621 is a deficient number, since it is larger than the sum of its proper divisors (33139411).

36551552621 is a wasteful number, since it uses less digits than its factorization.

36551552621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33139410.

The product of its digits is 270000, while the sum is 41.

The spelling of 36551552621 in words is "thirty-six billion, five hundred fifty-one million, five hundred fifty-two thousand, six hundred twenty-one".