25732052778 has 8 divisors (see below), whose sum is σ = 51464105568. Its totient is φ = 8577350924.

The previous prime is 25732052767. The next prime is 25732052807. The reversal of 25732052778 is 87725023752.

It is a sphenic number, since it is the product of 3 distinct primes.

25732052778 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2144337726 + ... + 2144337737.

It is an arithmetic number, because the mean of its divisors is an integer number (6433013196).

Almost surely, 2^25732052778 is an apocalyptic number.

25732052778 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

25732052778 is a wasteful number, since it uses less digits than its factorization.

25732052778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4288675468.

The product of its (nonzero) digits is 1646400, while the sum is 48.

The spelling of 25732052778 in words is "twenty-five billion, seven hundred thirty-two million, fifty-two thousand, seven hundred seventy-eight".