85766548537 has 4 divisors (see below), whose sum is σ = 86392581876. Its totient is φ = 85140515200.

The previous prime is 85766548499. The next prime is 85766548541. The reversal of 85766548537 is 73584566758.

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

It can be written as a sum of positive squares in 2 ways, for example, as 27265935376 + 58500613161 = 165124^2 + 241869^2 .

It is a cyclic number.

It is not a de Polignac number, because 85766548537 - 2⁷ = 85766548409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85766540537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 313016464 + ... + 313016737.

It is an arithmetic number, because the mean of its divisors is an integer number (21598145469).

Almost surely, 2^85766548537 is an apocalyptic number.

It is an amenable number.

85766548537 is a deficient number, since it is larger than the sum of its proper divisors (626033339).

85766548537 is a wasteful number, since it uses less digits than its factorization.

85766548537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 626033338.

The product of its digits is 169344000, while the sum is 64.

The spelling of 85766548537 in words is "eighty-five billion, seven hundred sixty-six million, five hundred forty-eight thousand, five hundred thirty-seven".