850791861 has 24 divisors (see below), whose sum is σ = 1325163840. Its totient is φ = 524232000.

The previous prime is 850791853. The next prime is 850791871. The reversal of 850791861 is 168197058.

It is not a de Polignac number, because 850791861 - 2³ = 850791853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (850791841) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 53665 + ... + 67686.

It is an arithmetic number, because the mean of its divisors is an integer number (55215160).

Almost surely, 2^850791861 is an apocalyptic number.

It is an amenable number.

850791861 is a deficient number, since it is larger than the sum of its proper divisors (474371979).

850791861 is a wasteful number, since it uses less digits than its factorization.

850791861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121417 (or 121414 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 45.

The square root of 850791861 is about 29168.3366169550. The cubic root of 850791861 is about 947.5623046217.

The spelling of 850791861 in words is "eight hundred fifty million, seven hundred ninety-one thousand, eight hundred sixty-one".