85405748187 has 4 divisors (see below), whose sum is σ = 113874330920. Its totient is φ = 56937165456.

The previous prime is 85405748173. The next prime is 85405748203. The reversal of 85405748187 is 78184750458.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 85405748187 - 2¹⁵ = 85405715419 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85405748387) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14234291362 + ... + 14234291367.

It is an arithmetic number, because the mean of its divisors is an integer number (28468582730).

Almost surely, 2^85405748187 is an apocalyptic number.

85405748187 is a deficient number, since it is larger than the sum of its proper divisors (28468582733).

85405748187 is a wasteful number, since it uses less digits than its factorization.

85405748187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28468582732.

The product of its (nonzero) digits is 10035200, while the sum is 57.

The spelling of 85405748187 in words is "eighty-five billion, four hundred five million, seven hundred forty-eight thousand, one hundred eighty-seven".