25496670981 has 16 divisors (see below), whose sum is σ = 34441795584. Its totient is φ = 16775100144.

The previous prime is 25496670959. The next prime is 25496671001. The reversal of 25496670981 is 18907669452.

It is not a de Polignac number, because 25496670981 - 2⁵ = 25496670949 is a prime.

It is a super-2 number, since 2×25496670981² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25496670181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 181740 + ... + 289866.

It is an arithmetic number, because the mean of its divisors is an integer number (2152612224).

Almost surely, 2^25496670981 is an apocalyptic number.

It is an amenable number.

25496670981 is a deficient number, since it is larger than the sum of its proper divisors (8945124603).

25496670981 is a wasteful number, since it uses less digits than its factorization.

25496670981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109160.

The product of its (nonzero) digits is 6531840, while the sum is 57.

The spelling of 25496670981 in words is "twenty-five billion, four hundred ninety-six million, six hundred seventy thousand, nine hundred eighty-one".