25406971969 has 16 divisors (see below), whose sum is σ = 26963608000. Its totient is φ = 23872631040.

The previous prime is 25406971951. The next prime is 25406972009. The reversal of 25406971969 is 96917960452.

It is a cyclic number.

It is not a de Polignac number, because 25406971969 - 2⁷ = 25406971841 is a prime.

It is a super-2 number, since 2×25406971969² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25406971769) 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 15 ways as a sum of consecutive naturals, for example, 2977429 + ... + 2985949.

It is an arithmetic number, because the mean of its divisors is an integer number (1685225500).

Almost surely, 2^25406971969 is an apocalyptic number.

It is an amenable number.

25406971969 is a deficient number, since it is larger than the sum of its proper divisors (1556636031).

25406971969 is a wasteful number, since it uses less digits than its factorization.

25406971969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9808.

The product of its (nonzero) digits is 7348320, while the sum is 58.

The spelling of 25406971969 in words is "twenty-five billion, four hundred six million, nine hundred seventy-one thousand, nine hundred sixty-nine".