25795277978 has 8 divisors (see below), whose sum is σ = 38800697760. Its totient is φ = 12861712060.

The previous prime is 25795277953. The next prime is 25795277993. The reversal of 25795277978 is 87977259752.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17962568 + ... + 17964003.

It is an arithmetic number, because the mean of its divisors is an integer number (4850087220).

Almost surely, 2^25795277978 is an apocalyptic number.

25795277978 is a deficient number, since it is larger than the sum of its proper divisors (13005419782).

25795277978 is a wasteful number, since it uses less digits than its factorization.

25795277978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35926932.

The product of its digits is 155584800, while the sum is 68.

The spelling of 25795277978 in words is "twenty-five billion, seven hundred ninety-five million, two hundred seventy-seven thousand, nine hundred seventy-eight".