25151251663 has 4 divisors (see below), whose sum is σ = 26244784368. Its totient is φ = 24057718960.

The previous prime is 25151251633. The next prime is 25151251687. The reversal of 25151251663 is 36615215152.

It is a happy number.

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-25151251663 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25151251603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 546766318 + ... + 546766363.

It is an arithmetic number, because the mean of its divisors is an integer number (6561196092).

Almost surely, 2^25151251663 is an apocalyptic number.

25151251663 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

25151251663 is a deficient number, since it is larger than the sum of its proper divisors (1093532705).

25151251663 is a wasteful number, since it uses less digits than its factorization.

25151251663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1093532704.

The product of its digits is 54000, while the sum is 37.

The spelling of 25151251663 in words is "twenty-five billion, one hundred fifty-one million, two hundred fifty-one thousand, six hundred sixty-three".