25702828978 has 8 divisors (see below), whose sum is σ = 38590584300. Its totient is φ = 12839300880.

The previous prime is 25702828973. The next prime is 25702828979. The reversal of 25702828978 is 87982820752.

It can be written as a sum of positive squares in 2 ways, for example, as 23532480409 + 2170348569 = 153403^2 + 46587^2 .

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

It is not an unprimeable number, because it can be changed into a prime (25702828973) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6054153 + ... + 6058396.

Almost surely, 2^25702828978 is an apocalyptic number.

25702828978 is a deficient number, since it is larger than the sum of its proper divisors (12887755322).

25702828978 is a wasteful number, since it uses less digits than its factorization.

25702828978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12113612.

The product of its (nonzero) digits is 9031680, while the sum is 58.

The spelling of 25702828978 in words is "twenty-five billion, seven hundred two million, eight hundred twenty-eight thousand, nine hundred seventy-eight".