85235991087556 has 9 divisors (see below), whose sum is σ = 149163016716399. Its totient is φ = 42617986311444.

The previous prime is 85235991087551. The next prime is 85235991087629. The reversal of 85235991087556 is 65578019953258.

The square root of 85235991087556 is 9232334.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85235991087551) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 16156585 + ... + 20772751.

Almost surely, 2^{85235991087556} is an apocalyptic number.

85235991087556 is the 9232334-th square number.

It is an amenable number.

85235991087556 is a deficient number, since it is larger than the sum of its proper divisors (63927025628843).

85235991087556 is an frugal number, since it uses more digits than its factorization.

85235991087556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9232338 (or 4616169 counting only the distinct ones).

The product of its (nonzero) digits is 816480000, while the sum is 73.

The spelling of 85235991087556 in words is "eighty-five trillion, two hundred thirty-five billion, nine hundred ninety-one million, eighty-seven thousand, five hundred fifty-six".