85809174747 has 16 divisors (see below), whose sum is σ = 115076831232. Its totient is φ = 56874602880.

The previous prime is 85809174727. The next prime is 85809174797. The reversal of 85809174747 is 74747190858.

It is not a de Polignac number, because 85809174747 - 2⁸ = 85809174491 is a prime.

It is a super-2 number, since 2×85809174747² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (85809174727) 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 15 ways as a sum of consecutive naturals, for example, 341098 + ... + 536624.

It is an arithmetic number, because the mean of its divisors is an integer number (7192301952).

Almost surely, 2^85809174747 is an apocalyptic number.

85809174747 is a deficient number, since it is larger than the sum of its proper divisors (29267656485).

85809174747 is a wasteful number, since it uses less digits than its factorization.

85809174747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196378.

The product of its (nonzero) digits is 15805440, while the sum is 60.

The spelling of 85809174747 in words is "eighty-five billion, eight hundred nine million, one hundred seventy-four thousand, seven hundred forty-seven".