164881199525 has 24 divisors (see below), whose sum is σ = 233824081920. Its totient is φ = 112982103360.

The previous prime is 164881199521. The next prime is 164881199531. The reversal of 164881199525 is 525991188461.

It is not a de Polignac number, because 164881199525 - 2² = 164881199521 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164881199521) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 79589 + ... + 579738.

It is an arithmetic number, because the mean of its divisors is an integer number (9742670080).

Almost surely, 2^164881199525 is an apocalyptic number.

It is an amenable number.

164881199525 is a deficient number, since it is larger than the sum of its proper divisors (68942882395).

164881199525 is a wasteful number, since it uses less digits than its factorization.

164881199525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 660773 (or 660768 counting only the distinct ones).

The product of its digits is 6220800, while the sum is 59.

The spelling of 164881199525 in words is "one hundred sixty-four billion, eight hundred eighty-one million, one hundred ninety-nine thousand, five hundred twenty-five".