36405651021 has 16 divisors (see below), whose sum is σ = 49677122880. Its totient is φ = 23702474880.

The previous prime is 36405651019. The next prime is 36405651031. The reversal of 36405651021 is 12015650463.

36405651021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 36405651021 - 2¹ = 36405651019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36405651031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1065361 + ... + 1099001.

It is an arithmetic number, because the mean of its divisors is an integer number (3104820180).

Almost surely, 2^36405651021 is an apocalyptic number.

It is an amenable number.

36405651021 is a deficient number, since it is larger than the sum of its proper divisors (13271471859).

36405651021 is a wasteful number, since it uses less digits than its factorization.

36405651021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42076.

The product of its (nonzero) digits is 21600, while the sum is 33.

The spelling of 36405651021 in words is "thirty-six billion, four hundred five million, six hundred fifty-one thousand, twenty-one".