851961706852 has 12 divisors (see below), whose sum is σ = 1490941152316. Its totient is φ = 425978520480.

The previous prime is 851961706819. The next prime is 851961706853. The reversal of 851961706852 is 258607169158.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 143024650596 + 708937056256 = 378186^2 + 841984^2 .

It is a hoax number, since the sum of its digits (58) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (851961706853) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 436558 + ... + 1376410.

Almost surely, 2^851961706852 is an apocalyptic number.

It is an amenable number.

851961706852 is a deficient number, since it is larger than the sum of its proper divisors (638979445464).

851961706852 is a wasteful number, since it uses less digits than its factorization.

851961706852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1166478 (or 1166476 counting only the distinct ones).

The product of its (nonzero) digits is 7257600, while the sum is 58.

The spelling of 851961706852 in words is "eight hundred fifty-one billion, nine hundred sixty-one million, seven hundred six thousand, eight hundred fifty-two".