25858582678 has 4 divisors (see below), whose sum is σ = 38787874020. Its totient is φ = 12929291338.

The previous prime is 25858582609. The next prime is 25858582709. The reversal of 25858582678 is 87628585852.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×25858582678² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6464645668 + ... + 6464645671.

It is an arithmetic number, because the mean of its divisors is an integer number (9696968505).

Almost surely, 2^25858582678 is an apocalyptic number.

25858582678 is a deficient number, since it is larger than the sum of its proper divisors (12929291342).

25858582678 is a wasteful number, since it uses less digits than its factorization.

25858582678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12929291341.

The product of its digits is 86016000, while the sum is 64.

The spelling of 25858582678 in words is "twenty-five billion, eight hundred fifty-eight million, five hundred eighty-two thousand, six hundred seventy-eight".