25392650947 has 4 divisors (see below), whose sum is σ = 26729106280. Its totient is φ = 24056195616.

The previous prime is 25392650903. The next prime is 25392650971. The reversal of 25392650947 is 74905629352.

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 25392650947 - 2⁷ = 25392650819 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25392650894 and 25392650903.

It is not an unprimeable number, because it can be changed into a prime (25392650047) 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, 668227638 + ... + 668227675.

It is an arithmetic number, because the mean of its divisors is an integer number (6682276570).

Almost surely, 2^25392650947 is an apocalyptic number.

25392650947 is a deficient number, since it is larger than the sum of its proper divisors (1336455333).

25392650947 is a wasteful number, since it uses less digits than its factorization.

25392650947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1336455332.

The product of its (nonzero) digits is 4082400, while the sum is 52.

The spelling of 25392650947 in words is "twenty-five billion, three hundred ninety-two million, six hundred fifty thousand, nine hundred forty-seven".