25719663842 has 16 divisors (see below), whose sum is σ = 42375648960. Its totient is φ = 11653302672.

The previous prime is 25719663839. The next prime is 25719663859. The reversal of 25719663842 is 24836691752.

It is a super-2 number, since 2×25719663842² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14712893 + ... + 14714640.

It is an arithmetic number, because the mean of its divisors is an integer number (2648478060).

Almost surely, 2^25719663842 is an apocalyptic number.

25719663842 is a deficient number, since it is larger than the sum of its proper divisors (16655985118).

25719663842 is a wasteful number, since it uses less digits than its factorization.

25719663842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29427577.

The product of its digits is 4354560, while the sum is 53.

The spelling of 25719663842 in words is "twenty-five billion, seven hundred nineteen million, six hundred sixty-three thousand, eight hundred forty-two".