25797830518 has 4 divisors (see below), whose sum is σ = 38696745780. Its totient is φ = 12898915258.

The previous prime is 25797830503. The next prime is 25797830519. The reversal of 25797830518 is 81503879752.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25797830519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6449457628 + ... + 6449457631.

It is an arithmetic number, because the mean of its divisors is an integer number (9674186445).

Almost surely, 2^25797830518 is an apocalyptic number.

25797830518 is a deficient number, since it is larger than the sum of its proper divisors (12898915262).

25797830518 is a wasteful number, since it uses less digits than its factorization.

25797830518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12898915261.

The product of its (nonzero) digits is 4233600, while the sum is 55.

The spelling of 25797830518 in words is "twenty-five billion, seven hundred ninety-seven million, eight hundred thirty thousand, five hundred eighteen".