25533531164 has 24 divisors (see below), whose sum is σ = 44800240800. Its totient is φ = 12733507584.

The previous prime is 25533531161. The next prime is 25533531203. The reversal of 25533531164 is 46113533552.

It is a super-2 number, since 2×25533531164² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25533531161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2641412 + ... + 2651060.

It is an arithmetic number, because the mean of its divisors is an integer number (1866676700).

Almost surely, 2^25533531164 is an apocalyptic number.

It is an amenable number.

25533531164 is a deficient number, since it is larger than the sum of its proper divisors (19266709636).

25533531164 is a wasteful number, since it uses less digits than its factorization.

25533531164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11309 (or 11307 counting only the distinct ones).

The product of its digits is 162000, while the sum is 38.

The spelling of 25533531164 in words is "twenty-five billion, five hundred thirty-three million, five hundred thirty-one thousand, one hundred sixty-four".