25578583306551 has 48 divisors (see below), whose sum is σ = 41705812980000. Its totient is φ = 14963910635520.

The previous prime is 25578583306547. The next prime is 25578583306567. The reversal of 25578583306551 is 15560338587552.

25578583306551 is a `hidden beast` number, since 2 + 5 + 5 + 78 + 5 + 8 + 3 + 3 + 0 + 6 + 551 = 666.

It is not a de Polignac number, because 25578583306551 - 2² = 25578583306547 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25578583306541) 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, 10524495 + ... + 12724863.

It is an arithmetic number, because the mean of its divisors is an integer number (868871103750).

Almost surely, 2^{25578583306551} is an apocalyptic number.

25578583306551 is a deficient number, since it is larger than the sum of its proper divisors (16127229673449).

25578583306551 is a wasteful number, since it uses less digits than its factorization.

25578583306551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2204464 (or 2204461 counting only the distinct ones).

The product of its (nonzero) digits is 151200000, while the sum is 63.

The spelling of 25578583306551 in words is "twenty-five trillion, five hundred seventy-eight billion, five hundred eighty-three million, three hundred six thousand, five hundred fifty-one".