25897292215 has 16 divisors (see below), whose sum is σ = 31683996288. Its totient is φ = 20313519616.

The previous prime is 25897292209. The next prime is 25897292299. The reversal of 25897292215 is 51229279852.

It is a cyclic number.

It is not a de Polignac number, because 25897292215 - 2³ = 25897292207 is a prime.

It is a Duffinian number.

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, 380082 + ... + 443008.

It is an arithmetic number, because the mean of its divisors is an integer number (1980249768).

Almost surely, 2^25897292215 is an apocalyptic number.

25897292215 is a deficient number, since it is larger than the sum of its proper divisors (5786704073).

25897292215 is a wasteful number, since it uses less digits than its factorization.

25897292215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64538.

The product of its digits is 1814400, while the sum is 52.

The spelling of 25897292215 in words is "twenty-five billion, eight hundred ninety-seven million, two hundred ninety-two thousand, two hundred fifteen".