25956297142 has 4 divisors (see below), whose sum is σ = 38934445716. Its totient is φ = 12978148570.

The previous prime is 25956297139. The next prime is 25956297167. The reversal of 25956297142 is 24179265952.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×25956297142² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 25956297142.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6489074284 + ... + 6489074287.

It is an arithmetic number, because the mean of its divisors is an integer number (9733611429).

Almost surely, 2^25956297142 is an apocalyptic number.

25956297142 is a deficient number, since it is larger than the sum of its proper divisors (12978148574).

25956297142 is a wasteful number, since it uses less digits than its factorization.

25956297142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12978148573.

The product of its digits is 2721600, while the sum is 52.

The spelling of 25956297142 in words is "twenty-five billion, nine hundred fifty-six million, two hundred ninety-seven thousand, one hundred forty-two".