25263391747 has 4 divisors (see below), whose sum is σ = 27560063736. Its totient is φ = 22966719760.

The previous prime is 25263391733. The next prime is 25263391753. The reversal of 25263391747 is 74719336252.

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

It is a cyclic number.

It is not a de Polignac number, because 25263391747 - 2⁷ = 25263391619 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25263391747.

It is not an unprimeable number, because it can be changed into a prime (25263391717) 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, 1148335978 + ... + 1148335999.

It is an arithmetic number, because the mean of its divisors is an integer number (6890015934).

Almost surely, 2^25263391747 is an apocalyptic number.

25263391747 is a deficient number, since it is larger than the sum of its proper divisors (2296671989).

25263391747 is a wasteful number, since it uses less digits than its factorization.

25263391747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2296671988.

The product of its digits is 1905120, while the sum is 49.

The spelling of 25263391747 in words is "twenty-five billion, two hundred sixty-three million, three hundred ninety-one thousand, seven hundred forty-seven".