25778497768 has 32 divisors (see below), whose sum is σ = 49696456320. Its totient is φ = 12528432000.

The previous prime is 25778497739. The next prime is 25778497847. The reversal of 25778497768 is 86779487752.

It is a junction number, because it is equal to n+sod(n) for n = 25778497697 and 25778497706.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56118 + ... + 233893.

It is an arithmetic number, because the mean of its divisors is an integer number (1553014260).

Almost surely, 2^25778497768 is an apocalyptic number.

It is an amenable number.

25778497768 is a deficient number, since it is larger than the sum of its proper divisors (23917958552).

25778497768 is a wasteful number, since it uses less digits than its factorization.

25778497768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290329 (or 290325 counting only the distinct ones).

The product of its digits is 331914240, while the sum is 70.

The spelling of 25778497768 in words is "twenty-five billion, seven hundred seventy-eight million, four hundred ninety-seven thousand, seven hundred sixty-eight".