25433265778 has 4 divisors (see below), whose sum is σ = 38149898670. Its totient is φ = 12716632888.

The previous prime is 25433265733. The next prime is 25433265779. The reversal of 25433265778 is 87756233452.

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., 13599524689 + 11833741089 = 116617^2 + 108783^2 .

It is not an unprimeable number, because it can be changed into a prime (25433265779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6358316443 + ... + 6358316446.

Almost surely, 2^25433265778 is an apocalyptic number.

25433265778 is a deficient number, since it is larger than the sum of its proper divisors (12716632892).

25433265778 is a wasteful number, since it uses less digits than its factorization.

25433265778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12716632891.

The product of its digits is 8467200, while the sum is 52.

The spelling of 25433265778 in words is "twenty-five billion, four hundred thirty-three million, two hundred sixty-five thousand, seven hundred seventy-eight".