25616434226 has 4 divisors (see below), whose sum is σ = 38424651342. Its totient is φ = 12808217112.

The previous prime is 25616434199. The next prime is 25616434231. The reversal of 25616434226 is 62243461652.

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., 15716383225 + 9900051001 = 125365^2 + 99499^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6404108555 + ... + 6404108558.

Almost surely, 2^25616434226 is an apocalyptic number.

25616434226 is a deficient number, since it is larger than the sum of its proper divisors (12808217116).

25616434226 is a wasteful number, since it uses less digits than its factorization.

25616434226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12808217115.

The product of its digits is 414720, while the sum is 41.

Adding to 25616434226 its reverse (62243461652), we get a palindrome (87859895878).

The spelling of 25616434226 in words is "twenty-five billion, six hundred sixteen million, four hundred thirty-four thousand, two hundred twenty-six".