85069281780 has 576 divisors, whose sum is σ = 329687285760. Its totient is φ = 17817926400.

The previous prime is 85069281779. The next prime is 85069281797. The reversal of 85069281780 is 8718296058.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 42300975 + ... + 42302985.

It is an arithmetic number, because the mean of its divisors is an integer number (572373760).

Almost surely, 2^85069281780 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 85069281780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (164843642880).

85069281780 is an abundant number, since it is smaller than the sum of its proper divisors (244618003980).

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

85069281780 is a wasteful number, since it uses less digits than its factorization.

85069281780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2105 (or 2078 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 54.

The spelling of 85069281780 in words is "eighty-five billion, sixty-nine million, two hundred eighty-one thousand, seven hundred eighty".