25579155456 has 104 divisors (see below), whose sum is σ = 75781166160. Its totient is φ = 8526348288.

The previous prime is 25579155443. The next prime is 25579155461. The reversal of 25579155456 is 65455197552.

25579155456 is a `hidden beast` number, since 2 + 5 + 5 + 7 + 91 + 5 + 545 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5055 + ... + 226238.

Almost surely, 2^25579155456 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25579155456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37890583080).

25579155456 is an abundant number, since it is smaller than the sum of its proper divisors (50202010704).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25579155456 is an equidigital number, since it uses as much as digits as its factorization.

25579155456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231326 (or 231298 counting only the distinct ones).

The product of its digits is 9450000, while the sum is 54.

The spelling of 25579155456 in words is "twenty-five billion, five hundred seventy-nine million, one hundred fifty-five thousand, four hundred fifty-six".