25678877550 has 48 divisors (see below), whose sum is σ = 63699308400. Its totient is φ = 6846013440.

The previous prime is 25678877527. The next prime is 25678877599. The reversal of 25678877550 is 5577887652.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 663534 + ... + 701166.

It is an arithmetic number, because the mean of its divisors is an integer number (1327068925).

Almost surely, 2^25678877550 is an apocalyptic number.

25678877550 is an abundant number, since it is smaller than the sum of its proper divisors (38020430850).

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

25678877550 is a wasteful number, since it uses less digits than its factorization.

25678877550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42197 (or 42192 counting only the distinct ones).

The product of its (nonzero) digits is 32928000, while the sum is 60.

The spelling of 25678877550 in words is "twenty-five billion, six hundred seventy-eight million, eight hundred seventy-seven thousand, five hundred fifty".