25909804995 has 16 divisors (see below), whose sum is σ = 41540824320. Its totient is φ = 13790183904.

The previous prime is 25909804981. The next prime is 25909805027. The reversal of 25909804995 is 59940890952.

It is not a de Polignac number, because 25909804995 - 2¹⁰ = 25909803971 is a prime.

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, 1766125 + ... + 1780734.

It is an arithmetic number, because the mean of its divisors is an integer number (2596301520).

Almost surely, 2^25909804995 is an apocalyptic number.

25909804995 is a deficient number, since it is larger than the sum of its proper divisors (15631019325).

25909804995 is a wasteful number, since it uses less digits than its factorization.

25909804995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3547354.

The product of its (nonzero) digits is 10497600, while the sum is 60.

The spelling of 25909804995 in words is "twenty-five billion, nine hundred nine million, eight hundred four thousand, nine hundred ninety-five".