851806536 has 32 divisors (see below), whose sum is σ = 2433733440. Its totient is φ = 243373248.

The previous prime is 851806481. The next prime is 851806583. The reversal of 851806536 is 635608158.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2534971 + ... + 2535306.

It is an arithmetic number, because the mean of its divisors is an integer number (76054170).

Almost surely, 2^851806536 is an apocalyptic number.

It is an amenable number.

851806536 is an abundant number, since it is smaller than the sum of its proper divisors (1581926904).

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

851806536 is a wasteful number, since it uses less digits than its factorization.

851806536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5070293 (or 5070289 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 42.

The square root of 851806536 is about 29185.7248667906. The cubic root of 851806536 is about 947.9388502279.

The spelling of 851806536 in words is "eight hundred fifty-one million, eight hundred six thousand, five hundred thirty-six".