25978111489 has 8 divisors (see below), whose sum is σ = 28360415232. Its totient is φ = 23599250640.

The previous prime is 25978111483. The next prime is 25978111499. The reversal of 25978111489 is 98411187952.

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

It is a cyclic number.

It is not a de Polignac number, because 25978111489 - 2⁵ = 25978111457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25978111483) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 844929 + ... + 875134.

It is an arithmetic number, because the mean of its divisors is an integer number (3545051904).

Almost surely, 2^25978111489 is an apocalyptic number.

It is an amenable number.

25978111489 is a deficient number, since it is larger than the sum of its proper divisors (2382303743).

25978111489 is a wasteful number, since it uses less digits than its factorization.

25978111489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1721447.

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

The spelling of 25978111489 in words is "twenty-five billion, nine hundred seventy-eight million, one hundred eleven thousand, four hundred eighty-nine".