3921503679864 has 64 divisors (see below), whose sum is σ = 10893767328000. Its totient is φ = 1307083707360.

The previous prime is 3921503679781. The next prime is 3921503679869. The reversal of 3921503679864 is 4689763051293.

3921503679864 is a `hidden beast` number, since 3 + 9 + 2 + 1 + 503 + 67 + 9 + 8 + 64 = 666.

It is a super-2 number, since 2×3921503679864² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3921503679869) 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, 2822869 + ... + 3976379.

It is an arithmetic number, because the mean of its divisors is an integer number (170215114500).

It is a 1-persistent number, because it is pandigital, but 2⋅3921503679864 = 7843007359728 is not.

Almost surely, 2^{3921503679864} is an apocalyptic number.

It is an amenable number.

3921503679864 is an abundant number, since it is smaller than the sum of its proper divisors (6972263648136).

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

3921503679864 is a wasteful number, since it uses less digits than its factorization.

3921503679864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1169265 (or 1169255 counting only the distinct ones).

The product of its (nonzero) digits is 58786560, while the sum is 63.

The spelling of 3921503679864 in words is "three trillion, nine hundred twenty-one billion, five hundred three million, six hundred seventy-nine thousand, eight hundred sixty-four".