3640621322036 has 24 divisors (see below), whose sum is σ = 6407222998176. Its totient is φ = 1809989120160.

The previous prime is 3640621322029. The next prime is 3640621322047. The reversal of 3640621322036 is 6302231260463.

It is a super-2 number, since 2×3640621322036² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4636655 + ... + 5364681.

It is an arithmetic number, because the mean of its divisors is an integer number (266967624924).

Almost surely, 2^{3640621322036} is an apocalyptic number.

It is an amenable number.

3640621322036 is a deficient number, since it is larger than the sum of its proper divisors (2766601676140).

3640621322036 is a wasteful number, since it uses less digits than its factorization.

3640621322036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 735119 (or 735117 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 38.

Adding to 3640621322036 its reverse (6302231260463), we get a palindrome (9942852582499).

The spelling of 3640621322036 in words is "three trillion, six hundred forty billion, six hundred twenty-one million, three hundred twenty-two thousand, thirty-six".