25506992422 has 4 divisors (see below), whose sum is σ = 38260488636. Its totient is φ = 12753496210.

The previous prime is 25506992411. The next prime is 25506992429. The reversal of 25506992422 is 22429960552.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25506992429) 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 as a sum of consecutive naturals, namely, 6376748104 + ... + 6376748107.

It is an arithmetic number, because the mean of its divisors is an integer number (9565122159).

Almost surely, 2^25506992422 is an apocalyptic number.

25506992422 is a deficient number, since it is larger than the sum of its proper divisors (12753496214).

25506992422 is a wasteful number, since it uses less digits than its factorization.

25506992422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12753496213.

The product of its (nonzero) digits is 777600, while the sum is 46.

The spelling of 25506992422 in words is "twenty-five billion, five hundred six million, nine hundred ninety-two thousand, four hundred twenty-two".