85243677771 has 32 divisors (see below), whose sum is σ = 133684899840. Its totient is φ = 47295017856.

The previous prime is 85243677733. The next prime is 85243677781. The reversal of 85243677771 is 17777634258.

It is not a de Polignac number, because 85243677771 - 2¹¹ = 85243675723 is a prime.

It is not an unprimeable number, because it can be changed into a prime (85243677721) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 257665 + ... + 486701.

It is an arithmetic number, because the mean of its divisors is an integer number (4177653120).

Almost surely, 2^85243677771 is an apocalyptic number.

85243677771 is a deficient number, since it is larger than the sum of its proper divisors (48441222069).

85243677771 is a wasteful number, since it uses less digits than its factorization.

85243677771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229563.

The product of its digits is 13829760, while the sum is 57.

The spelling of 85243677771 in words is "eighty-five billion, two hundred forty-three million, six hundred seventy-seven thousand, seven hundred seventy-one".