363687618640 has 80 divisors (see below), whose sum is σ = 849351495168. Its totient is φ = 144826454528.

The previous prime is 363687618617. The next prime is 363687618641. The reversal of 363687618640 is 46816786363.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (363687618641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18117249 + ... + 18137311.

Almost surely, 2^363687618640 is an apocalyptic number.

It is an amenable number.

363687618640 is an abundant number, since it is smaller than the sum of its proper divisors (485663876528).

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

363687618640 is a wasteful number, since it uses less digits than its factorization.

363687618640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21076 (or 21070 counting only the distinct ones).

The product of its (nonzero) digits is 20901888, while the sum is 58.

The spelling of 363687618640 in words is "three hundred sixty-three billion, six hundred eighty-seven million, six hundred eighteen thousand, six hundred forty".