851211680622336 has 144 divisors (see below), whose sum is σ = 2746017480030720. Its totient is φ = 257942933498880.

The previous prime is 851211680622311. The next prime is 851211680622361. The reversal of 851211680622336 is 633226086112158.

851211680622336 is a `hidden beast` number, since 8 + 5 + 1 + 2 + 1 + 1 + 6 + 8 + 0 + 622 + 3 + 3 + 6 = 666.

It is an interprime number because it is at equal distance from previous prime (851211680622311) and next prime (851211680622361).

It is a tau number, because it is divible by the number of its divisors (144).

It is a super-2 number, since 2×851211680622336² (a number of 31 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 5597643880 + ... + 5597795943.

Almost surely, 2^{851211680622336} is an apocalyptic number.

It is an amenable number.

851211680622336 is an abundant number, since it is smaller than the sum of its proper divisors (1894805799408384).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

851211680622336 is a wasteful number, since it uses less digits than its factorization.

851211680622336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11195439859 (or 11195439839 counting only the distinct ones).

The product of its (nonzero) digits is 4976640, while the sum is 54.

The spelling of 851211680622336 in words is "eight hundred fifty-one trillion, two hundred eleven billion, six hundred eighty million, six hundred twenty-two thousand, three hundred thirty-six".