25513047830978 has 8 divisors (see below), whose sum is σ = 38331396581520. Its totient is φ = 12735915637140.

The previous prime is 25513047830971. The next prime is 25513047830989. The reversal of 25513047830978 is 87903874031552.

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

It is a self number, because there is not a number n which added to its sum of digits gives 25513047830978.

It is not an unprimeable number, because it can be changed into a prime (25513047830971) 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, 10304137628 + ... + 10304140103.

It is an arithmetic number, because the mean of its divisors is an integer number (4791424572690).

Almost surely, 2^{25513047830978} is an apocalyptic number.

25513047830978 is a deficient number, since it is larger than the sum of its proper divisors (12818348750542).

25513047830978 is a wasteful number, since it uses less digits than its factorization.

25513047830978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20608278352.

The product of its (nonzero) digits is 50803200, while the sum is 62.

The spelling of 25513047830978 in words is "twenty-five trillion, five hundred thirteen billion, forty-seven million, eight hundred thirty thousand, nine hundred seventy-eight".