25990019882 has 4 divisors (see below), whose sum is σ = 38985029826. Its totient is φ = 12995009940.

The previous prime is 25990019833. The next prime is 25990019893. The reversal of 25990019882 is 28891009952.

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

It can be written as a sum of positive squares in only one way, i.e., 16057704961 + 9932314921 = 126719^2 + 99661^2 .

It is a super-2 number, since 2×25990019882² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6497504969 + ... + 6497504972.

Almost surely, 2^25990019882 is an apocalyptic number.

25990019882 is a deficient number, since it is larger than the sum of its proper divisors (12995009944).

25990019882 is a wasteful number, since it uses less digits than its factorization.

25990019882 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12995009943.

The product of its (nonzero) digits is 933120, while the sum is 53.

The spelling of 25990019882 in words is "twenty-five billion, nine hundred ninety million, nineteen thousand, eight hundred eighty-two".