85011771580 has 24 divisors (see below), whose sum is σ = 178624697328. Its totient is φ = 33985665408.

The previous prime is 85011771557. The next prime is 85011771583. The reversal of 85011771580 is 8517711058.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85011771583) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1153569 + ... + 1225048.

It is an arithmetic number, because the mean of its divisors is an integer number (7442695722).

Almost surely, 2^85011771580 is an apocalyptic number.

It is an amenable number.

85011771580 is an abundant number, since it is smaller than the sum of its proper divisors (93612925748).

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

85011771580 is a wasteful number, since it uses less digits than its factorization.

85011771580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2380413 (or 2380411 counting only the distinct ones).

The product of its (nonzero) digits is 78400, while the sum is 43.

The spelling of 85011771580 in words is "eighty-five billion, eleven million, seven hundred seventy-one thousand, five hundred eighty".