25642055931 has 8 divisors (see below), whose sum is σ = 35675904000. Its totient is φ = 16351455912.

The previous prime is 25642055917. The next prime is 25642055987. The reversal of 25642055931 is 13955024652.

It is a happy number.

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

It is not a de Polignac number, because 25642055931 - 2¹¹ = 25642053883 is a prime.

It is a super-2 number, since 2×25642055931² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25642059931) 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, 185811931 + ... + 185812068.

It is an arithmetic number, because the mean of its divisors is an integer number (4459488000).

Almost surely, 2^25642055931 is an apocalyptic number.

25642055931 is a deficient number, since it is larger than the sum of its proper divisors (10033848069).

25642055931 is a wasteful number, since it uses less digits than its factorization.

25642055931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 371624025.

The product of its (nonzero) digits is 324000, while the sum is 42.

The spelling of 25642055931 in words is "twenty-five billion, six hundred forty-two million, fifty-five thousand, nine hundred thirty-one".