25978111498 has 8 divisors (see below), whose sum is σ = 39007054692. Its totient is φ = 12975759936.

The previous prime is 25978111483. The next prime is 25978111499. The reversal of 25978111498 is 89411187952.

It can be written as a sum of positive squares in 2 ways, for example, as 16554167569 + 9423943929 = 128663^2 + 97077^2 .

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 (25978111499) by changing a digit.

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, 6645465 + ... + 6649372.

Almost surely, 2^25978111498 is an apocalyptic number.

25978111498 is a deficient number, since it is larger than the sum of its proper divisors (13028943194).

25978111498 is a wasteful number, since it uses less digits than its factorization.

25978111498 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13295816.

The product of its digits is 1451520, while the sum is 55.

The spelling of 25978111498 in words is "twenty-five billion, nine hundred seventy-eight million, one hundred eleven thousand, four hundred ninety-eight".