85813812453634 has 24 divisors (see below), whose sum is σ = 136863030397428. Its totient is φ = 40346023361280.

The previous prime is 85813812453563. The next prime is 85813812453637. The reversal of 85813812453634 is 43635421831858.

It can be written as a sum of positive squares in 6 ways, for example, as 66121048305225 + 19692764148409 = 8131485^2 + 4437653^2 .

It is not an unprimeable number, because it can be changed into a prime (85813812453637) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 67285357 + ... + 68548864.

Almost surely, 2^{85813812453634} is an apocalyptic number.

85813812453634 is a deficient number, since it is larger than the sum of its proper divisors (51049217943794).

85813812453634 is a wasteful number, since it uses less digits than its factorization.

85813812453634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135835350 (or 135835333 counting only the distinct ones).

The product of its digits is 66355200, while the sum is 61.

The spelling of 85813812453634 in words is "eighty-five trillion, eight hundred thirteen billion, eight hundred twelve million, four hundred fifty-three thousand, six hundred thirty-four".