25918874490 has 16 divisors (see below), whose sum is σ = 62205298848. Its totient is φ = 6911699856.

The previous prime is 25918874479. The next prime is 25918874503. The reversal of 25918874490 is 9447881952.

It is a self number, because there is not a number n which added to its sum of digits gives 25918874490.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 431981212 + ... + 431981271.

It is an arithmetic number, because the mean of its divisors is an integer number (3887831178).

Almost surely, 2^25918874490 is an apocalyptic number.

25918874490 is an abundant number, since it is smaller than the sum of its proper divisors (36286424358).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25918874490 is a wasteful number, since it uses less digits than its factorization.

25918874490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 863962493.

The product of its (nonzero) digits is 5806080, while the sum is 57.

The spelling of 25918874490 in words is "twenty-five billion, nine hundred eighteen million, eight hundred seventy-four thousand, four hundred ninety".