25530538877 has 4 divisors (see below), whose sum is σ = 25532273760. Its totient is φ = 25528803996.

The previous prime is 25530538793. The next prime is 25530538883. The reversal of 25530538877 is 77883503552.

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 a de Polignac number, because none of the positive numbers 2^k-25530538877 is a prime.

It is a super-2 number, since 2×25530538877² (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 (25530538897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 845177 + ... + 874862.

It is an arithmetic number, because the mean of its divisors is an integer number (6383068440).

Almost surely, 2^25530538877 is an apocalyptic number.

It is an amenable number.

25530538877 is a deficient number, since it is larger than the sum of its proper divisors (1734883).

25530538877 is a wasteful number, since it uses less digits than its factorization.

25530538877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1734882.

The product of its (nonzero) digits is 7056000, while the sum is 53.

The spelling of 25530538877 in words is "twenty-five billion, five hundred thirty million, five hundred thirty-eight thousand, eight hundred seventy-seven".