850721694936 has 16 divisors (see below), whose sum is σ = 2126804237400. Its totient is φ = 283573898304.

The previous prime is 850721694923. The next prime is 850721694937. The reversal of 850721694936 is 639496127058.

850721694936 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 850721694936.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (850721694937) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17723368621 + ... + 17723368668.

It is a 1-persistent number, because it is pandigital, but 2⋅850721694936 = 1701443389872 is not.

Almost surely, 2^850721694936 is an apocalyptic number.

It is an amenable number.

850721694936 is an abundant number, since it is smaller than the sum of its proper divisors (1276082542464).

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

850721694936 is a wasteful number, since it uses less digits than its factorization.

850721694936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35446737298 (or 35446737294 counting only the distinct ones).

The product of its (nonzero) digits is 19595520, while the sum is 60.

The spelling of 850721694936 in words is "eight hundred fifty billion, seven hundred twenty-one million, six hundred ninety-four thousand, nine hundred thirty-six".