25163130951989 has 4 divisors (see below), whose sum is σ = 25163492244300. Its totient is φ = 25162769659680.

The previous prime is 25163130951977. The next prime is 25163130952013. The reversal of 25163130951989 is 98915903136152.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12318576707089 + 12844554244900 = 3509783^2 + 3583930^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25163130951989 is a prime.

It is a super-2 number, since 2×25163130951989² (a number of 28 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 (25163130951949) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 180541664 + ... + 180680985.

It is an arithmetic number, because the mean of its divisors is an integer number (6290873061075).

Almost surely, 2^{25163130951989} is an apocalyptic number.

It is an amenable number.

25163130951989 is a deficient number, since it is larger than the sum of its proper divisors (361292311).

25163130951989 is an equidigital number, since it uses as much as digits as its factorization.

25163130951989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361292310.

The product of its (nonzero) digits is 15746400, while the sum is 62.

The spelling of 25163130951989 in words is "twenty-five trillion, one hundred sixty-three billion, one hundred thirty million, nine hundred fifty-one thousand, nine hundred eighty-nine".