36135615621 has 16 divisors (see below), whose sum is σ = 55126183424. Its totient is φ = 20625527664.

The previous prime is 36135615569. The next prime is 36135615623. The reversal of 36135615621 is 12651653163.

36135615621 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 36135615621 - 2¹⁴ = 36135599237 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 36135615621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36135615623) 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, 955831 + ... + 992916.

It is an arithmetic number, because the mean of its divisors is an integer number (3445386464).

Almost surely, 2^36135615621 is an apocalyptic number.

It is an amenable number.

36135615621 is a deficient number, since it is larger than the sum of its proper divisors (18990567803).

36135615621 is a wasteful number, since it uses less digits than its factorization.

36135615621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1949640.

The product of its digits is 97200, while the sum is 39.

The spelling of 36135615621 in words is "thirty-six billion, one hundred thirty-five million, six hundred fifteen thousand, six hundred twenty-one".