25876990519 has 4 divisors (see below), whose sum is σ = 25878803544. Its totient is φ = 25875177496.

The previous prime is 25876990501. The next prime is 25876990541. The reversal of 25876990519 is 91509967852.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25876990519 is a prime.

It is a super-2 number, since 2×25876990519² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25876990219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 884932 + ... + 913705.

It is an arithmetic number, because the mean of its divisors is an integer number (6469700886).

Almost surely, 2^25876990519 is an apocalyptic number.

25876990519 is a deficient number, since it is larger than the sum of its proper divisors (1813025).

25876990519 is a wasteful number, since it uses less digits than its factorization.

25876990519 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1813024.

The product of its (nonzero) digits is 12247200, while the sum is 61.

The spelling of 25876990519 in words is "twenty-five billion, eight hundred seventy-six million, nine hundred ninety thousand, five hundred nineteen".