25154542551 has 32 divisors (see below), whose sum is σ = 35576755200. Its totient is φ = 15783152000.

The previous prime is 25154542499. The next prime is 25154542559. The reversal of 25154542551 is 15524545152.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 25154542551 - 2⁷ = 25154542423 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25154542559) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1014085 + ... + 1038593.

It is an arithmetic number, because the mean of its divisors is an integer number (1111773600).

Almost surely, 2^25154542551 is an apocalyptic number.

25154542551 is a deficient number, since it is larger than the sum of its proper divisors (10422212649).

25154542551 is a wasteful number, since it uses less digits than its factorization.

25154542551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24839.

The product of its digits is 200000, while the sum is 39.

The spelling of 25154542551 in words is "twenty-five billion, one hundred fifty-four million, five hundred forty-two thousand, five hundred fifty-one".