25917542145 has 48 divisors (see below), whose sum is σ = 49393723392. Its totient is φ = 12467105280.

The previous prime is 25917542099. The next prime is 25917542159. The reversal of 25917542145 is 54124571952.

25917542145 is a `hidden beast` number, since 2 + 5 + 91 + 7 + 542 + 14 + 5 = 666.

It is not a de Polignac number, because 25917542145 - 2⁹ = 25917541633 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 25917542145.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 143272 + ... + 269001.

It is an arithmetic number, because the mean of its divisors is an integer number (1029035904).

Almost surely, 2^25917542145 is an apocalyptic number.

It is an amenable number.

25917542145 is a deficient number, since it is larger than the sum of its proper divisors (23476181247).

25917542145 is a wasteful number, since it uses less digits than its factorization.

25917542145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 412422 (or 412419 counting only the distinct ones).

The product of its digits is 504000, while the sum is 45.

The spelling of 25917542145 in words is "twenty-five billion, nine hundred seventeen million, five hundred forty-two thousand, one hundred forty-five".