164396252381 has 16 divisors (see below), whose sum is σ = 180467049600. Its totient is φ = 149252862528.

The previous prime is 164396252357. The next prime is 164396252389. The reversal of 164396252381 is 183252693461.

It is a de Polignac number, because none of the positive numbers 2^k-164396252381 is a prime.

It is a super-2 number, since 2×164396252381² (a number of 23 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 (164396252389) 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, 2049386 + ... + 2128091.

It is an arithmetic number, because the mean of its divisors is an integer number (11279190600).

Almost surely, 2^164396252381 is an apocalyptic number.

It is an amenable number.

164396252381 is a deficient number, since it is larger than the sum of its proper divisors (16070797219).

164396252381 is a wasteful number, since it uses less digits than its factorization.

164396252381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4177588.

The product of its digits is 1866240, while the sum is 50.

The spelling of 164396252381 in words is "one hundred sixty-four billion, three hundred ninety-six million, two hundred fifty-two thousand, three hundred eighty-one".