3659720813904 has 20 divisors (see below), whose sum is σ = 9454278769376. Its totient is φ = 1219906937952.

The previous prime is 3659720813869. The next prime is 3659720813909. The reversal of 3659720813904 is 4093180279563.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3659720813909) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38122091764 + ... + 38122091859.

It is a 1-persistent number, because it is pandigital, but 2⋅3659720813904 = 7319441627808 is not.

Almost surely, 2^{3659720813904} is an apocalyptic number.

It is an amenable number.

3659720813904 is an abundant number, since it is smaller than the sum of its proper divisors (5794557955472).

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

3659720813904 is a wasteful number, since it uses less digits than its factorization.

3659720813904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76244183634 (or 76244183628 counting only the distinct ones).

The product of its (nonzero) digits is 9797760, while the sum is 57.

The spelling of 3659720813904 in words is "three trillion, six hundred fifty-nine billion, seven hundred twenty million, eight hundred thirteen thousand, nine hundred four".