25812578448 has 100 divisors (see below), whose sum is σ = 77285378940. Its totient is φ = 8307484416.

The previous prime is 25812578431. The next prime is 25812578501. The reversal of 25812578448 is 84487521852.

25812578448 is a `hidden beast` number, since 2 + 5 + 8 + 125 + 78 + 448 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 6572669184 + 19239909264 = 81072^2 + 138708^2 .

It is a super-2 number, since 2×25812578448² (a number of 22 digits) contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 25812578394 and 25812578403.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 305815 + ... + 380982.

Almost surely, 2^25812578448 is an apocalyptic number.

It is an amenable number.

25812578448 is an abundant number, since it is smaller than the sum of its proper divisors (51472800492).

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

25812578448 is a wasteful number, since it uses less digits than its factorization.

25812578448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 686846 (or 686831 counting only the distinct ones).

The product of its digits is 5734400, while the sum is 54.

The spelling of 25812578448 in words is "twenty-five billion, eight hundred twelve million, five hundred seventy-eight thousand, four hundred forty-eight".