85723669922 has 90 divisors (see below), whose sum is σ = 149013654465. Its totient is φ = 36984017840.

The previous prime is 85723669901. The next prime is 85723670029. The reversal of 85723669922 is 22996632758.

It can be written as a sum of positive squares in 2 ways, for example, as 85672704601 + 50965321 = 292699^2 + 7139^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=207031.

It is a Harshad number since it is a multiple of its sum of digits (59).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 1452943529 + ... + 1452943587.

Almost surely, 2^85723669922 is an apocalyptic number.

85723669922 is a deficient number, since it is larger than the sum of its proper divisors (63289984543).

85723669922 is an frugal number, since it uses more digits than its factorization.

85723669922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222 (or 101 counting only the distinct ones).

The product of its digits is 19595520, while the sum is 59.

The spelling of 85723669922 in words is "eighty-five billion, seven hundred twenty-three million, six hundred sixty-nine thousand, nine hundred twenty-two".