25440111478 has 8 divisors (see below), whose sum is σ = 38197618920. Its totient is φ = 12707571840.

The previous prime is 25440111451. The next prime is 25440111493. The reversal of 25440111478 is 87411104452.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6239403 + ... + 6243478.

It is an arithmetic number, because the mean of its divisors is an integer number (4774702365).

Almost surely, 2^25440111478 is an apocalyptic number.

25440111478 is a deficient number, since it is larger than the sum of its proper divisors (12757507442).

25440111478 is a wasteful number, since it uses less digits than its factorization.

25440111478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12483902.

The product of its (nonzero) digits is 35840, while the sum is 37.

The spelling of 25440111478 in words is "twenty-five billion, four hundred forty million, one hundred eleven thousand, four hundred seventy-eight".