25315188473 has 4 divisors (see below), whose sum is σ = 26131807488. Its totient is φ = 24498569460.

The previous prime is 25315188467. The next prime is 25315188491. The reversal of 25315188473 is 37488151352.

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 25315188473 - 2¹⁰ = 25315187449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25315181473) 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, 408309461 + ... + 408309522.

It is an arithmetic number, because the mean of its divisors is an integer number (6532951872).

Almost surely, 2^25315188473 is an apocalyptic number.

It is an amenable number.

25315188473 is a deficient number, since it is larger than the sum of its proper divisors (816619015).

25315188473 is an equidigital number, since it uses as much as digits as its factorization.

25315188473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 816619014.

The product of its digits is 806400, while the sum is 47.

The spelling of 25315188473 in words is "twenty-five billion, three hundred fifteen million, one hundred eighty-eight thousand, four hundred seventy-three".