812488682258 has 18 divisors (see below), whose sum is σ = 1339622228007. Its totient is φ = 369306663660.

The previous prime is 812488682231. The next prime is 812488682279. The reversal of 812488682258 is 852286884218.

It can be written as a sum of positive squares in only one way, i.e., 406244341129 + 406244341129 = 637373^2 + 637373^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=637373.

It is a Smith number, since the sum of its digits (62) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 812488682258.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 13993235 + ... + 14051177.

Almost surely, 2^812488682258 is an apocalyptic number.

812488682258 is a deficient number, since it is larger than the sum of its proper divisors (527133545749).

812488682258 is an frugal number, since it uses more digits than its factorization.

812488682258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115910 (or 57956 counting only the distinct ones).

The product of its digits is 31457280, while the sum is 62.

The spelling of 812488682258 in words is "eight hundred twelve billion, four hundred eighty-eight million, six hundred eighty-two thousand, two hundred fifty-eight".