851669136 has 30 divisors (see below), whose sum is σ = 2383491110. Its totient is φ = 283889664.

The previous prime is 851669123. The next prime is 851669141. The reversal of 851669136 is 631966158.

It can be written as a sum of positive squares in only one way, i.e., 681210000 + 170459136 = 26100^2 + 13056^2 .

It is a junction number, because it is equal to n+sod(n) for n = 851669091 and 851669100.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2957041 + ... + 2957328.

Almost surely, 2^851669136 is an apocalyptic number.

It is an amenable number.

851669136 is an abundant number, since it is smaller than the sum of its proper divisors (1531821974).

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

851669136 is a wasteful number, since it uses less digits than its factorization.

851669136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5914383 (or 5914374 counting only the distinct ones).

The product of its digits is 233280, while the sum is 45.

The square root of 851669136 is about 29183.3708813769. The cubic root of 851669136 is about 947.8878786374.

The spelling of 851669136 in words is "eight hundred fifty-one million, six hundred sixty-nine thousand, one hundred thirty-six".