25506878 has 4 divisors (see below), whose sum is σ = 38260320. Its totient is φ = 12753438.

The previous prime is 25506847. The next prime is 25506881. The reversal of 25506878 is 87860552.

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, 6376718 + ... + 6376721.

It is an arithmetic number, because the mean of its divisors is an integer number (9565080).

Almost surely, 2^25506878 is an apocalyptic number.

25506878 is a deficient number, since it is larger than the sum of its proper divisors (12753442).

25506878 is a wasteful number, since it uses less digits than its factorization.

25506878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12753441.

The product of its (nonzero) digits is 134400, while the sum is 41.

The square root of 25506878 is about 5050.4334467449. The cubic root of 25506878 is about 294.3647269762.

The spelling of 25506878 in words is "twenty-five million, five hundred six thousand, eight hundred seventy-eight".