25678734980 has 48 divisors (see below), whose sum is σ = 56096712000. Its totient is φ = 9861860736.

The previous prime is 25678734943. The next prime is 25678735007. The reversal of 25678734980 is 8943787652.

It is a happy number.

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 in 15 ways as a sum of consecutive naturals, for example, 19850 + ... + 227489.

It is an arithmetic number, because the mean of its divisors is an integer number (1168681500).

Almost surely, 2^25678734980 is an apocalyptic number.

25678734980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25678734980 is an abundant number, since it is smaller than the sum of its proper divisors (30417977020).

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

25678734980 is a wasteful number, since it uses less digits than its factorization.

25678734980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247556 (or 247554 counting only the distinct ones).

The product of its (nonzero) digits is 20321280, while the sum is 59.

The spelling of 25678734980 in words is "twenty-five billion, six hundred seventy-eight million, seven hundred thirty-four thousand, nine hundred eighty".