25455221152 has 12 divisors (see below), whose sum is σ = 50114966706. Its totient is φ = 12727610560.

The previous prime is 25455221149. The next prime is 25455221153. The reversal of 25455221152 is 25112255452.

It can be written as a sum of positive squares in only one way, i.e., 24274886416 + 1180334736 = 155804^2 + 34356^2 .

It is not an unprimeable number, because it can be changed into a prime (25455221153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 397737799 + ... + 397737862.

Almost surely, 2^25455221152 is an apocalyptic number.

It is an amenable number.

25455221152 is a deficient number, since it is larger than the sum of its proper divisors (24659745554).

25455221152 is an equidigital number, since it uses as much as digits as its factorization.

25455221152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 795475671 (or 795475663 counting only the distinct ones).

The product of its digits is 40000, while the sum is 34.

The spelling of 25455221152 in words is "twenty-five billion, four hundred fifty-five million, two hundred twenty-one thousand, one hundred fifty-two".