25775005280778 has 40 divisors (see below), whose sum is σ = 62197804770948. Its totient is φ = 7930770854976.

The previous prime is 25775005280743. The next prime is 25775005280789. The reversal of 25775005280778 is 87708250057752.

25775005280778 is a `hidden beast` number, since 2 + 5 + 7 + 7 + 500 + 52 + 8 + 0 + 7 + 78 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 21419281841409 + 4355723439369 = 4628097^2 + 2087037^2 .

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 19 ways as a sum of consecutive naturals, for example, 6119419851 + ... + 6119424062.

Almost surely, 2^{25775005280778} is an apocalyptic number.

25775005280778 is an abundant number, since it is smaller than the sum of its proper divisors (36422799490170).

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

25775005280778 is a wasteful number, since it uses less digits than its factorization.

25775005280778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12238843940 (or 12238843931 counting only the distinct ones).

The product of its (nonzero) digits is 76832000, while the sum is 63.

The spelling of 25775005280778 in words is "twenty-five trillion, seven hundred seventy-five billion, five million, two hundred eighty thousand, seven hundred seventy-eight".