25464206661 has 8 divisors (see below), whose sum is σ = 34100539680. Its totient is φ = 16902005712.

The previous prime is 25464206659. The next prime is 25464206681. The reversal of 25464206661 is 16660246452.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 25464206661 - 2¹ = 25464206659 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25464206641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18532215 + ... + 18533588.

It is an arithmetic number, because the mean of its divisors is an integer number (4262567460).

Almost surely, 2^25464206661 is an apocalyptic number.

It is an amenable number.

25464206661 is a deficient number, since it is larger than the sum of its proper divisors (8636333019).

25464206661 is a wasteful number, since it uses less digits than its factorization.

25464206661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37066035.

The product of its (nonzero) digits is 414720, while the sum is 42.

The spelling of 25464206661 in words is "twenty-five billion, four hundred sixty-four million, two hundred six thousand, six hundred sixty-one".