25662040551 has 24 divisors (see below), whose sum is σ = 42371316000. Its totient is φ = 14661052416.

The previous prime is 25662040541. The next prime is 25662040553. The reversal of 25662040551 is 15504026652.

25662040551 is a `hidden beast` number, since 2 + 5 + 6 + 62 + 0 + 40 + 551 = 666.

It is not a de Polignac number, because 25662040551 - 2¹⁸ = 25661778407 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25662040553) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 293575 + ... + 370823.

It is an arithmetic number, because the mean of its divisors is an integer number (1765471500).

Almost surely, 2^25662040551 is an apocalyptic number.

25662040551 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

25662040551 is a deficient number, since it is larger than the sum of its proper divisors (16709275449).

25662040551 is a wasteful number, since it uses less digits than its factorization.

25662040551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82535 (or 82532 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

The spelling of 25662040551 in words is "twenty-five billion, six hundred sixty-two million, forty thousand, five hundred fifty-one".