25642378756 has 6 divisors (see below), whose sum is σ = 44874162830. Its totient is φ = 12821189376.

The previous prime is 25642378733. The next prime is 25642378763. The reversal of 25642378756 is 65787324652.

It can be written as a sum of positive squares in only one way, i.e., 22519804356 + 3122574400 = 150066^2 + 55880^2 .

It is a junction number, because it is equal to n+sod(n) for n = 25642378697 and 25642378706.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3205297341 + ... + 3205297348.

Almost surely, 2^25642378756 is an apocalyptic number.

It is an amenable number.

25642378756 is a deficient number, since it is larger than the sum of its proper divisors (19231784074).

25642378756 is a wasteful number, since it uses less digits than its factorization.

25642378756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6410594693 (or 6410594691 counting only the distinct ones).

The product of its digits is 16934400, while the sum is 55.

The spelling of 25642378756 in words is "twenty-five billion, six hundred forty-two million, three hundred seventy-eight thousand, seven hundred fifty-six".