25718763720 has 128 divisors (see below), whose sum is σ = 85118221440. Its totient is φ = 6176348160.

The previous prime is 25718763689. The next prime is 25718763757. The reversal of 25718763720 is 2736781752.

It is a super-2 number, since 2×25718763720² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 25718763720.

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 31 ways as a sum of consecutive naturals, for example, 137094 + ... + 265013.

It is an arithmetic number, because the mean of its divisors is an integer number (664986105).

Almost surely, 2^25718763720 is an apocalyptic number.

25718763720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25718763720 is an abundant number, since it is smaller than the sum of its proper divisors (59399457720).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25718763720 is a wasteful number, since it uses less digits than its factorization.

25718763720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402175 (or 402171 counting only the distinct ones).

The product of its (nonzero) digits is 987840, while the sum is 48.

The spelling of 25718763720 in words is "twenty-five billion, seven hundred eighteen million, seven hundred sixty-three thousand, seven hundred twenty".