85721650936 has 32 divisors (see below), whose sum is σ = 161394127200. Its totient is φ = 42683397120.

The previous prime is 85721650919. The next prime is 85721650961. The reversal of 85721650936 is 63905612758.

It is a super-3 number, since 3×85721650936³ (a number of 34 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4200325 + ... + 4220683.

It is an arithmetic number, because the mean of its divisors is an integer number (5043566475).

Almost surely, 2^85721650936 is an apocalyptic number.

It is an amenable number.

85721650936 is a deficient number, since it is larger than the sum of its proper divisors (75672476264).

85721650936 is a wasteful number, since it uses less digits than its factorization.

85721650936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22519 (or 22515 counting only the distinct ones).

The product of its (nonzero) digits is 2721600, while the sum is 52.

The spelling of 85721650936 in words is "eighty-five billion, seven hundred twenty-one million, six hundred fifty thousand, nine hundred thirty-six".