25700002451 has 4 divisors (see below), whose sum is σ = 25935782400. Its totient is φ = 25464222504.

The previous prime is 25700002429. The next prime is 25700002469. The reversal of 25700002451 is 15420000752.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25700002451 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25700002451.

It is not an unprimeable number, because it can be changed into a prime (25700002651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 117889811 + ... + 117890028.

It is an arithmetic number, because the mean of its divisors is an integer number (6483945600).

Almost surely, 2^25700002451 is an apocalyptic number.

25700002451 is a deficient number, since it is larger than the sum of its proper divisors (235779949).

25700002451 is a wasteful number, since it uses less digits than its factorization.

25700002451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235779948.

The product of its (nonzero) digits is 2800, while the sum is 26.

The spelling of 25700002451 in words is "twenty-five billion, seven hundred million, two thousand, four hundred fifty-one".