25117342644 has 48 divisors (see below), whose sum is σ = 58851072000. Its totient is φ = 8337675360.

The previous prime is 25117342643. The next prime is 25117342681. The reversal of 25117342644 is 44624371152.

It is a super-2 number, since 2×25117342644² (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 (25117342643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2935837 + ... + 2944379.

It is an arithmetic number, because the mean of its divisors is an integer number (1226064000).

Almost surely, 2^25117342644 is an apocalyptic number.

It is an amenable number.

25117342644 is an abundant number, since it is smaller than the sum of its proper divisors (33733729356).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25117342644 is a wasteful number, since it uses less digits than its factorization.

25117342644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9540 (or 9538 counting only the distinct ones).

The product of its digits is 161280, while the sum is 39.

The spelling of 25117342644 in words is "twenty-five billion, one hundred seventeen million, three hundred forty-two thousand, six hundred forty-four".