25226945165985 has 16 divisors (see below), whose sum is σ = 41301789296064. Its totient is φ = 13141478411712.

The previous prime is 25226945165833. The next prime is 25226945165993. The reversal of 25226945165985 is 58956154962252.

It is not a de Polignac number, because 25226945165985 - 2²⁰ = 25226944117409 is a prime.

It is a super-2 number, since 2×25226945165985² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19555770802 + ... + 19555772091.

It is an arithmetic number, because the mean of its divisors is an integer number (2581361831004).

Almost surely, 2^{25226945165985} is an apocalyptic number.

It is an amenable number.

25226945165985 is a deficient number, since it is larger than the sum of its proper divisors (16074844130079).

25226945165985 is a wasteful number, since it uses less digits than its factorization.

25226945165985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39111542944.

The product of its digits is 466560000, while the sum is 69.

The spelling of 25226945165985 in words is "twenty-five trillion, two hundred twenty-six billion, nine hundred forty-five million, one hundred sixty-five thousand, nine hundred eighty-five".