850164781 has 16 divisors (see below), whose sum is σ = 911948544. Its totient is φ = 789744384.

The previous prime is 850164737. The next prime is 850164829. The reversal of 850164781 is 187461058.

It is not a de Polignac number, because 850164781 - 2¹³ = 850156589 is a prime.

It is a super-2 number, since 2×850164781² = 1445560309705555922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (850114781) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 694536 + ... + 695758.

It is an arithmetic number, because the mean of its divisors is an integer number (56996784).

Almost surely, 2^850164781 is an apocalyptic number.

It is an amenable number.

850164781 is a deficient number, since it is larger than the sum of its proper divisors (61783763).

850164781 is a wasteful number, since it uses less digits than its factorization.

850164781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1740.

The product of its (nonzero) digits is 53760, while the sum is 40.

The square root of 850164781 is about 29157.5853081149. The cubic root of 850164781 is about 947.3294457043.

The spelling of 850164781 in words is "eight hundred fifty million, one hundred sixty-four thousand, seven hundred eighty-one".