25708652816 has 60 divisors (see below), whose sum is σ = 63210396240. Its totient is φ = 10016354880.

The previous prime is 25708652741. The next prime is 25708652819. The reversal of 25708652816 is 61825680752.

It is a super-2 number, since 2×25708652816² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25708652819) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1481906 + ... + 1499153.

It is an arithmetic number, because the mean of its divisors is an integer number (1053506604).

Almost surely, 2^25708652816 is an apocalyptic number.

It is an amenable number.

25708652816 is an abundant number, since it is smaller than the sum of its proper divisors (37501743424).

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

25708652816 is a wasteful number, since it uses less digits than its factorization.

25708652816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2981092 (or 2981079 counting only the distinct ones).

The product of its (nonzero) digits is 1612800, while the sum is 50.

The spelling of 25708652816 in words is "twenty-five billion, seven hundred eight million, six hundred fifty-two thousand, eight hundred sixteen".