85247790656 has 112 divisors (see below), whose sum is σ = 204406195200. Its totient is φ = 34458628608.

The previous prime is 85247790643. The next prime is 85247790721. The reversal of 85247790656 is 65609774258.

It is a tau number, because it is divible by the number of its divisors (112).

It is a Smith number, since the sum of its digits (59) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 85247790595 and 85247790604.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1910165 + ... + 1954283.

Almost surely, 2^85247790656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 85247790656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102203097600).

85247790656 is an abundant number, since it is smaller than the sum of its proper divisors (119158404544).

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

85247790656 is a wasteful number, since it uses less digits than its factorization.

85247790656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44384 (or 44374 counting only the distinct ones).

The product of its (nonzero) digits is 25401600, while the sum is 59.

The spelling of 85247790656 in words is "eighty-five billion, two hundred forty-seven million, seven hundred ninety thousand, six hundred fifty-six".