425253287218 has 4 divisors (see below), whose sum is σ = 637879930830. Its totient is φ = 212626643608.

The previous prime is 425253287197. The next prime is 425253287231. The reversal of 425253287218 is 812782352524.

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., 308994792129 + 116258495089 = 555873^2 + 340967^2 .

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106313321803 + ... + 106313321806.

Almost surely, 2^425253287218 is an apocalyptic number.

425253287218 is a deficient number, since it is larger than the sum of its proper divisors (212626643612).

425253287218 is a wasteful number, since it uses less digits than its factorization.

425253287218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212626643611.

The product of its digits is 2150400, while the sum is 49.

The spelling of 425253287218 in words is "four hundred twenty-five billion, two hundred fifty-three million, two hundred eighty-seven thousand, two hundred eighteen".