25641026157 has 8 divisors (see below), whose sum is σ = 34191062176. Its totient is φ = 17092503792.

The previous prime is 25641026143. The next prime is 25641026171. The reversal of 25641026157 is 75162014652.

It is an interprime number because it is at equal distance from previous prime (25641026143) and next prime (25641026171).

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

It is not a de Polignac number, because 25641026157 - 2⁶ = 25641026093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25641026107) 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 7 ways as a sum of consecutive naturals, for example, 338278 + ... + 407079.

It is an arithmetic number, because the mean of its divisors is an integer number (4273882772).

Almost surely, 2^25641026157 is an apocalyptic number.

It is an amenable number.

25641026157 is a deficient number, since it is larger than the sum of its proper divisors (8550036019).

25641026157 is a wasteful number, since it uses less digits than its factorization.

25641026157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 756827.

The product of its (nonzero) digits is 100800, while the sum is 39.

The spelling of 25641026157 in words is "twenty-five billion, six hundred forty-one million, twenty-six thousand, one hundred fifty-seven".