85734781660 has 24 divisors (see below), whose sum is σ = 196410591216. Its totient is φ = 31176284160.

The previous prime is 85734781621. The next prime is 85734781703. The reversal of 85734781660 is 6618743758.

It is a Harshad number since it is a multiple of its sum of digits (55).

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, 194851557 + ... + 194851996.

It is an arithmetic number, because the mean of its divisors is an integer number (8183774634).

Almost surely, 2^85734781660 is an apocalyptic number.

It is an amenable number.

85734781660 is an abundant number, since it is smaller than the sum of its proper divisors (110675809556).

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

85734781660 is a wasteful number, since it uses less digits than its factorization.

85734781660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389703573 (or 389703571 counting only the distinct ones).

The product of its (nonzero) digits is 6773760, while the sum is 55.

The spelling of 85734781660 in words is "eighty-five billion, seven hundred thirty-four million, seven hundred eighty-one thousand, six hundred sixty".