3878221911064 has 16 divisors (see below), whose sum is σ = 7271894065320. Its totient is φ = 1939050160320.

The previous prime is 3878221911041. The next prime is 3878221911197. The reversal of 3878221911064 is 4601191228783.

It is a super-2 number, since 2×3878221911064² (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 3 ways as a sum of consecutive naturals, for example, 7327717 + ... + 7839124.

Almost surely, 2^{3878221911064} is an apocalyptic number.

It is an amenable number.

3878221911064 is a deficient number, since it is larger than the sum of its proper divisors (3393672154256).

3878221911064 is a wasteful number, since it uses less digits than its factorization.

3878221911064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15198810 (or 15198806 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 52.

The spelling of 3878221911064 in words is "three trillion, eight hundred seventy-eight billion, two hundred twenty-one million, nine hundred eleven thousand, sixty-four".