25505032605 has 16 divisors (see below), whose sum is σ = 43947133440. Its totient is φ = 12556323648.

The previous prime is 25505032583. The next prime is 25505032621. The reversal of 25505032605 is 50623050552.

It is not a de Polignac number, because 25505032605 - 2⁵ = 25505032573 is a prime.

It is a super-2 number, since 2×25505032605² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

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, 65397325 + ... + 65397714.

It is an arithmetic number, because the mean of its divisors is an integer number (2746695840).

Almost surely, 2^25505032605 is an apocalyptic number.

It is an amenable number.

25505032605 is a deficient number, since it is larger than the sum of its proper divisors (18442100835).

25505032605 is a wasteful number, since it uses less digits than its factorization.

25505032605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130795060.

The product of its (nonzero) digits is 45000, while the sum is 33.

The spelling of 25505032605 in words is "twenty-five billion, five hundred five million, thirty-two thousand, six hundred five".