86921503850 has 24 divisors (see below), whose sum is σ = 161684270220. Its totient is φ = 34766392320.

The previous prime is 86921503847. The next prime is 86921503859. The reversal of 86921503850 is 5830512968.

It can be written as a sum of positive squares in 6 ways, for example, as 39139478569 + 47782025281 = 197837^2 + 218591^2 .

It is a super-3 number, since 3×86921503850³ (a number of 34 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 86921503795 and 86921503804.

It is not an unprimeable number, because it can be changed into a prime (86921503859) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 904724 + ... + 996176.

Almost surely, 2^86921503850 is an apocalyptic number.

86921503850 is a deficient number, since it is larger than the sum of its proper divisors (74762766370).

86921503850 is a wasteful number, since it uses less digits than its factorization.

86921503850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110474 (or 110469 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 47.

The spelling of 86921503850 in words is "eighty-six billion, nine hundred twenty-one million, five hundred three thousand, eight hundred fifty".