25965164381 has 32 divisors (see below), whose sum is σ = 29817876480. Its totient is φ = 22412376000.

The previous prime is 25965164371. The next prime is 25965164417. The reversal of 25965164381 is 18346156952.

It is a cyclic number.

It is not a de Polignac number, because 25965164381 - 2³⁰ = 24891422557 is a prime.

It is a super-2 number, since 2×25965164381² (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 (25965164321) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6077276 + ... + 6081546.

It is an arithmetic number, because the mean of its divisors is an integer number (931808640).

Almost surely, 2^25965164381 is an apocalyptic number.

It is an amenable number.

25965164381 is a deficient number, since it is larger than the sum of its proper divisors (3852712099).

25965164381 is a wasteful number, since it uses less digits than its factorization.

25965164381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4617.

The product of its digits is 1555200, while the sum is 50.

The spelling of 25965164381 in words is "twenty-five billion, nine hundred sixty-five million, one hundred sixty-four thousand, three hundred eighty-one".