25670971381 has 16 divisors (see below), whose sum is σ = 28914771456. Its totient is φ = 22579200000.

The previous prime is 25670971357. The next prime is 25670971411. The reversal of 25670971381 is 18317907652.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 25670971381 - 2⁷ = 25670971253 is a prime.

It is a super-2 number, since 2×25670971381² (a number of 22 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 (25670971181) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2668981 + ... + 2678581.

It is an arithmetic number, because the mean of its divisors is an integer number (1807173216).

Almost surely, 2^25670971381 is an apocalyptic number.

It is an amenable number.

25670971381 is a deficient number, since it is larger than the sum of its proper divisors (3243800075).

25670971381 is a wasteful number, since it uses less digits than its factorization.

25670971381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17484.

The product of its (nonzero) digits is 635040, while the sum is 49.

The spelling of 25670971381 in words is "twenty-five billion, six hundred seventy million, nine hundred seventy-one thousand, three hundred eighty-one".