25305721375 has 16 divisors (see below), whose sum is σ = 34452591264. Its totient is φ = 18404160000.

The previous prime is 25305721367. The next prime is 25305721393. The reversal of 25305721375 is 57312750352.

It is not a de Polignac number, because 25305721375 - 2³ = 25305721367 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 9200706 + ... + 9203455.

It is an arithmetic number, because the mean of its divisors is an integer number (2153286954).

Almost surely, 2^25305721375 is an apocalyptic number.

25305721375 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

25305721375 is a deficient number, since it is larger than the sum of its proper divisors (9146869889).

25305721375 is a wasteful number, since it uses less digits than its factorization.

25305721375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18404187 (or 18404177 counting only the distinct ones).

The product of its (nonzero) digits is 220500, while the sum is 40.

The spelling of 25305721375 in words is "twenty-five billion, three hundred five million, seven hundred twenty-one thousand, three hundred seventy-five".