25172671553 has 24 divisors (see below), whose sum is σ = 26992582656. Its totient is φ = 23449910400.

The previous prime is 25172671547. The next prime is 25172671583. The reversal of 25172671553 is 35517627152.

It is a de Polignac number, because none of the positive numbers 2^k-25172671553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25172671583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9983933 + ... + 9986453.

It is an arithmetic number, because the mean of its divisors is an integer number (1124690944).

Almost surely, 2^25172671553 is an apocalyptic number.

It is an amenable number.

25172671553 is a deficient number, since it is larger than the sum of its proper divisors (1819911103).

25172671553 is a wasteful number, since it uses less digits than its factorization.

25172671553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2993 (or 2964 counting only the distinct ones).

The product of its digits is 441000, while the sum is 44.

The spelling of 25172671553 in words is "twenty-five billion, one hundred seventy-two million, six hundred seventy-one thousand, five hundred fifty-three".