850997386692 has 18 divisors (see below), whose sum is σ = 2151132283118. Its totient is φ = 283665795552.

The previous prime is 850997386649. The next prime is 850997386721. The reversal of 850997386692 is 296683799058.

It can be written as a sum of positive squares in only one way, i.e., 820629444996 + 30367941696 = 905886^2 + 174264^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×850997386692² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 850997386692.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11819408113 + ... + 11819408184.

Almost surely, 2^850997386692 is an apocalyptic number.

It is an amenable number.

850997386692 is an abundant number, since it is smaller than the sum of its proper divisors (1300134896426).

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

850997386692 is a wasteful number, since it uses less digits than its factorization.

850997386692 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23638816307 (or 23638816302 counting only the distinct ones).

The product of its (nonzero) digits is 352719360, while the sum is 72.

The spelling of 850997386692 in words is "eight hundred fifty billion, nine hundred ninety-seven million, three hundred eighty-six thousand, six hundred ninety-two".