64194867176381 has 16 divisors (see below), whose sum is σ = 64658273428224. Its totient is φ = 63733458055104.

The previous prime is 64194867176369. The next prime is 64194867176413. The reversal of 64194867176381 is 18367176849146.

It is a cyclic number.

It is not a de Polignac number, because 64194867176381 - 2⁴² = 59796820665277 is a prime.

It is a super-2 number, since 2×64194867176381² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64194867176351) 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, 111856895 + ... + 112429331.

It is an arithmetic number, because the mean of its divisors is an integer number (4041142089264).

Almost surely, 2^{64194867176381} is an apocalyptic number.

It is an amenable number.

64194867176381 is a deficient number, since it is larger than the sum of its proper divisors (463406251843).

64194867176381 is a wasteful number, since it uses less digits than its factorization.

64194867176381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 574180.

The product of its digits is 292626432, while the sum is 71.

The spelling of 64194867176381 in words is "sixty-four trillion, one hundred ninety-four billion, eight hundred sixty-seven million, one hundred seventy-six thousand, three hundred eighty-one".