25255581077 has 4 divisors (see below), whose sum is σ = 25256726880. Its totient is φ = 25254435276.

The previous prime is 25255581073. The next prime is 25255581079. The reversal of 25255581077 is 77018555252.

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 25255581077 - 2² = 25255581073 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25255581073) 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, 539177 + ... + 584142.

It is an arithmetic number, because the mean of its divisors is an integer number (6314181720).

Almost surely, 2^25255581077 is an apocalyptic number.

It is an amenable number.

25255581077 is a deficient number, since it is larger than the sum of its proper divisors (1145803).

25255581077 is a wasteful number, since it uses less digits than its factorization.

25255581077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1145802.

The product of its (nonzero) digits is 980000, while the sum is 47.

The spelling of 25255581077 in words is "twenty-five billion, two hundred fifty-five million, five hundred eighty-one thousand, seventy-seven".