25615481472 has 384 divisors, whose sum is σ = 89181456000. Its totient is φ = 7318708992.

The previous prime is 25615481471. The next prime is 25615481483. The reversal of 25615481472 is 27418451652.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

25615481472 is a `hidden beast` number, since 2 + 5 + 61 + 548 + 1 + 47 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (384).

Its product of digits (537600) is a multiple of the sum of its prime divisors (12).

It is not an unprimeable number, because it can be changed into a prime (25615481471) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3659354493 + ... + 3659354499.

It is an arithmetic number, because the mean of its divisors is an integer number (232243375).

Almost surely, 2^25615481472 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 25615481472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44590728000).

25615481472 is an abundant number, since it is smaller than the sum of its proper divisors (63565974528).

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

25615481472 is an frugal number, since it uses more digits than its factorization.

25615481472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78 (or 12 counting only the distinct ones).

The product of its digits is 537600, while the sum is 45.

The spelling of 25615481472 in words is "twenty-five billion, six hundred fifteen million, four hundred eighty-one thousand, four hundred seventy-two".