85709516029 has 4 divisors (see below), whose sum is σ = 90751252284. Its totient is φ = 80667779776.

The previous prime is 85709516023. The next prime is 85709516107. The reversal of 85709516029 is 92061590758.

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 74652993529 + 11056522500 = 273227^2 + 105150^2 .

It is a cyclic number.

It is not a de Polignac number, because 85709516029 - 2³³ = 77119581437 is a prime.

It is a super-2 number, since 2×85709516029² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85709516023) 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, 2520868102 + ... + 2520868135.

It is an arithmetic number, because the mean of its divisors is an integer number (22687813071).

Almost surely, 2^85709516029 is an apocalyptic number.

It is an amenable number.

85709516029 is a deficient number, since it is larger than the sum of its proper divisors (5041736255).

85709516029 is a wasteful number, since it uses less digits than its factorization.

85709516029 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5041736254.

The product of its (nonzero) digits is 1360800, while the sum is 52.

The spelling of 85709516029 in words is "eighty-five billion, seven hundred nine million, five hundred sixteen thousand, twenty-nine".