25778776653608 has 64 divisors (see below), whose sum is σ = 54225575349120. Its totient is φ = 11387347763200.

The previous prime is 25778776653601. The next prime is 25778776653613. The reversal of 25778776653608 is 80635667787752.

It is not an unprimeable number, because it can be changed into a prime (25778776653601) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12973316 + ... + 14827827.

It is an arithmetic number, because the mean of its divisors is an integer number (847274614830).

Almost surely, 2^{25778776653608} is an apocalyptic number.

It is an amenable number.

25778776653608 is an abundant number, since it is smaller than the sum of its proper divisors (28446798695512).

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

25778776653608 is a wasteful number, since it uses less digits than its factorization.

25778776653608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27801458 (or 27801454 counting only the distinct ones).

The product of its (nonzero) digits is 4978713600, while the sum is 77.

The spelling of 25778776653608 in words is "twenty-five trillion, seven hundred seventy-eight billion, seven hundred seventy-six million, six hundred fifty-three thousand, six hundred eight".