25340978051 has 4 divisors (see below), whose sum is σ = 25719201672. Its totient is φ = 24962754432.

The previous prime is 25340978017. The next prime is 25340978057. The reversal of 25340978051 is 15087904352.

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 25340978051 - 2³⁴ = 8161108867 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25340977993 and 25340978011.

It is not an unprimeable number, because it can be changed into a prime (25340978057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 189111710 + ... + 189111843.

It is an arithmetic number, because the mean of its divisors is an integer number (6429800418).

Almost surely, 2^25340978051 is an apocalyptic number.

25340978051 is a deficient number, since it is larger than the sum of its proper divisors (378223621).

25340978051 is an equidigital number, since it uses as much as digits as its factorization.

25340978051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378223620.

The product of its (nonzero) digits is 302400, while the sum is 44.

The spelling of 25340978051 in words is "twenty-five billion, three hundred forty million, nine hundred seventy-eight thousand, fifty-one".