25578278511 has 16 divisors (see below), whose sum is σ = 34496188416. Its totient is φ = 16857067136.

The previous prime is 25578278497. The next prime is 25578278513. The reversal of 25578278511 is 11587287552.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25578278511 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25578278513) 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, 31336 + ... + 228338.

It is an arithmetic number, because the mean of its divisors is an integer number (2156011776).

Almost surely, 2^25578278511 is an apocalyptic number.

25578278511 is a deficient number, since it is larger than the sum of its proper divisors (8917909905).

25578278511 is a wasteful number, since it uses less digits than its factorization.

25578278511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197502.

The product of its digits is 1568000, while the sum is 51.

The spelling of 25578278511 in words is "twenty-five billion, five hundred seventy-eight million, two hundred seventy-eight thousand, five hundred eleven".