25440422278 has 8 divisors (see below), whose sum is σ = 38162444760. Its totient is φ = 12719607360.

The previous prime is 25440422237. The next prime is 25440422279. The reversal of 25440422278 is 87222404452.

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 25440422278.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25440422279) by changing a digit.

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, 247243 + ... + 334678.

It is an arithmetic number, because the mean of its divisors is an integer number (4770305595).

Almost surely, 2^25440422278 is an apocalyptic number.

25440422278 is a deficient number, since it is larger than the sum of its proper divisors (12722022482).

25440422278 is a wasteful number, since it uses less digits than its factorization.

25440422278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 603782.

The product of its (nonzero) digits is 286720, while the sum is 40.

The spelling of 25440422278 in words is "twenty-five billion, four hundred forty million, four hundred twenty-two thousand, two hundred seventy-eight".