25788530881 has 4 divisors (see below), whose sum is σ = 27145822000. Its totient is φ = 24431239764.

The previous prime is 25788530869. The next prime is 25788530891. The reversal of 25788530881 is 18803588752.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25788530881 - 2¹³ = 25788522689 is a prime.

It is a super-2 number, since 2×25788530881² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25788530891) 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, 678645531 + ... + 678645568.

It is an arithmetic number, because the mean of its divisors is an integer number (6786455500).

Almost surely, 2^25788530881 is an apocalyptic number.

It is an amenable number.

25788530881 is a deficient number, since it is larger than the sum of its proper divisors (1357291119).

25788530881 is a wasteful number, since it uses less digits than its factorization.

25788530881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1357291118.

The product of its (nonzero) digits is 4300800, while the sum is 55.

The spelling of 25788530881 in words is "twenty-five billion, seven hundred eighty-eight million, five hundred thirty thousand, eight hundred eighty-one".