25818908005078 has 4 divisors (see below), whose sum is σ = 38728362007620. Its totient is φ = 12909454002538.

The previous prime is 25818908005049. The next prime is 25818908005097. The reversal of 25818908005078 is 87050080981852.

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

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, 6454727001268 + ... + 6454727001271.

It is an arithmetic number, because the mean of its divisors is an integer number (9682090501905).

Almost surely, 2^{25818908005078} is an apocalyptic number.

25818908005078 is a deficient number, since it is larger than the sum of its proper divisors (12909454002542).

25818908005078 is a wasteful number, since it uses less digits than its factorization.

25818908005078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12909454002541.

The product of its (nonzero) digits is 12902400, while the sum is 61.

The spelling of 25818908005078 in words is "twenty-five trillion, eight hundred eighteen billion, nine hundred eight million, five thousand, seventy-eight".