25500527778 has 16 divisors (see below), whose sum is σ = 55637515296. Its totient is φ = 7727432640.

The previous prime is 25500527753. The next prime is 25500527803. The reversal of 25500527778 is 87772500552.

It is an interprime number because it is at equal distance from previous prime (25500527753) and next prime (25500527803).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 193185751 + ... + 193185882.

It is an arithmetic number, because the mean of its divisors is an integer number (3477344706).

Almost surely, 2^25500527778 is an apocalyptic number.

25500527778 is an abundant number, since it is smaller than the sum of its proper divisors (30136987518).

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

25500527778 is a wasteful number, since it uses less digits than its factorization.

25500527778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 386371649.

The product of its (nonzero) digits is 1372000, while the sum is 48.

The spelling of 25500527778 in words is "twenty-five billion, five hundred million, five hundred twenty-seven thousand, seven hundred seventy-eight".