25396959531 has 8 divisors (see below), whose sum is σ = 34004298240. Its totient is φ = 16860463592.

The previous prime is 25396959503. The next prime is 25396959571. The reversal of 25396959531 is 13595969352.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25396959531 - 2⁷ = 25396959403 is a prime.

It is a super-2 number, since 2×25396959531² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25396959571) 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, 17709855 + ... + 17711288.

It is an arithmetic number, because the mean of its divisors is an integer number (4250537280).

Almost surely, 2^25396959531 is an apocalyptic number.

25396959531 is a deficient number, since it is larger than the sum of its proper divisors (8607338709).

25396959531 is a wasteful number, since it uses less digits than its factorization.

25396959531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35421385.

The product of its digits is 9841500, while the sum is 57.

The spelling of 25396959531 in words is "twenty-five billion, three hundred ninety-six million, nine hundred fifty-nine thousand, five hundred thirty-one".