25585865501 has 16 divisors (see below), whose sum is σ = 29685270528. Its totient is φ = 21599808000.

The previous prime is 25585865479. The next prime is 25585865533. The reversal of 25585865501 is 10556858552.

It is not a de Polignac number, because 25585865501 - 2¹⁴ = 25585849117 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 25585865501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25585865561) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40301 + ... + 229773.

It is an arithmetic number, because the mean of its divisors is an integer number (1855329408).

Almost surely, 2^25585865501 is an apocalyptic number.

It is an amenable number.

25585865501 is a deficient number, since it is larger than the sum of its proper divisors (4099405027).

25585865501 is a wasteful number, since it uses less digits than its factorization.

25585865501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189772.

The product of its (nonzero) digits is 2400000, while the sum is 50.

The spelling of 25585865501 in words is "twenty-five billion, five hundred eighty-five million, eight hundred sixty-five thousand, five hundred one".