36403621644 has 24 divisors (see below), whose sum is σ = 91475767600. Its totient is φ = 11201114304.

The previous prime is 36403621643. The next prime is 36403621649. The reversal of 36403621644 is 44612630463.

36403621644 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (36403621643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 116678119 + ... + 116678430.

Almost surely, 2^36403621644 is an apocalyptic number.

It is an amenable number.

36403621644 is an abundant number, since it is smaller than the sum of its proper divisors (55072145956).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

36403621644 is a wasteful number, since it uses less digits than its factorization.

36403621644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233356569 (or 233356567 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 39.

The spelling of 36403621644 in words is "thirty-six billion, four hundred three million, six hundred twenty-one thousand, six hundred forty-four".