25996725226 has 4 divisors (see below), whose sum is σ = 38995087842. Its totient is φ = 12998362612.

The previous prime is 25996725187. The next prime is 25996725233. The reversal of 25996725226 is 62252769952.

It is a Cunningham number, because it is equal to 161235²+1.

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

It can be written as a sum of positive squares in only one way, i.e., 25996725225 + 1 = 161235^2 + 1^2 .

It is a super-2 number, since 2×25996725226² (a number of 22 digits) contains 22 as substring.

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, 6499181305 + ... + 6499181308.

Almost surely, 2^25996725226 is an apocalyptic number.

25996725226 is a deficient number, since it is larger than the sum of its proper divisors (12998362616).

25996725226 is a wasteful number, since it uses less digits than its factorization.

25996725226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12998362615.

The product of its digits is 8164800, while the sum is 55.

The spelling of 25996725226 in words is "twenty-five billion, nine hundred ninety-six million, seven hundred twenty-five thousand, two hundred twenty-six".