25252291978 has 8 divisors (see below), whose sum is σ = 37882056960. Its totient is φ = 12624939660.

The previous prime is 25252291877. The next prime is 25252292017. The reversal of 25252291978 is 87919225252.

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 (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 576768 + ... + 619003.

It is an arithmetic number, because the mean of its divisors is an integer number (4735257120).

Almost surely, 2^25252291978 is an apocalyptic number.

25252291978 is a deficient number, since it is larger than the sum of its proper divisors (12629764982).

25252291978 is a wasteful number, since it uses less digits than its factorization.

25252291978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1206332.

The product of its digits is 1814400, while the sum is 52.

The spelling of 25252291978 in words is "twenty-five billion, two hundred fifty-two million, two hundred ninety-one thousand, nine hundred seventy-eight".