25722438788 has 6 divisors (see below), whose sum is σ = 45014267886. Its totient is φ = 12861219392.

The previous prime is 25722438743. The next prime is 25722438803. The reversal of 25722438788 is 88783422752.

It can be written as a sum of positive squares in only one way, i.e., 18279580804 + 7442857984 = 135202^2 + 86272^2 .

It is an unprimeable number.

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, 3215304845 + ... + 3215304852.

It is an arithmetic number, because the mean of its divisors is an integer number (7502377981).

Almost surely, 2^25722438788 is an apocalyptic number.

It is an amenable number.

25722438788 is a deficient number, since it is larger than the sum of its proper divisors (19291829098).

25722438788 is a wasteful number, since it uses less digits than its factorization.

25722438788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6430609701 (or 6430609699 counting only the distinct ones).

The product of its digits is 12042240, while the sum is 56.

The spelling of 25722438788 in words is "twenty-five billion, seven hundred twenty-two million, four hundred thirty-eight thousand, seven hundred eighty-eight".