25530997677 has 4 divisors (see below), whose sum is σ = 34041330240. Its totient is φ = 17020665116.

The previous prime is 25530997643. The next prime is 25530997741. The reversal of 25530997677 is 77679903552.

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 25530997677 - 2¹⁰ = 25530996653 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25530997677.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25530997627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4255166277 + ... + 4255166282.

It is an arithmetic number, because the mean of its divisors is an integer number (8510332560).

Almost surely, 2^25530997677 is an apocalyptic number.

It is an amenable number.

25530997677 is a deficient number, since it is larger than the sum of its proper divisors (8510332563).

25530997677 is an equidigital number, since it uses as much as digits as its factorization.

25530997677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8510332562.

The product of its (nonzero) digits is 25004700, while the sum is 60.

The spelling of 25530997677 in words is "twenty-five billion, five hundred thirty million, nine hundred ninety-seven thousand, six hundred seventy-seven".