85838177909 has 12 divisors (see below), whose sum is σ = 95186035308. Its totient is φ = 77344122240.

The previous prime is 85838177897. The next prime is 85838177951. The reversal of 85838177909 is 90977183858.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 33624556900 + 52213621009 = 183370^2 + 228503^2 .

It is not a de Polignac number, because 85838177909 - 2²⁰ = 85837129333 is a prime.

It is a super-2 number, since 2×85838177909² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85838177989) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3125294 + ... + 3152639.

It is an arithmetic number, because the mean of its divisors is an integer number (7932169609).

Almost surely, 2^85838177909 is an apocalyptic number.

It is an amenable number.

85838177909 is a deficient number, since it is larger than the sum of its proper divisors (9347857399).

85838177909 is a wasteful number, since it uses less digits than its factorization.

85838177909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6278068 (or 6278057 counting only the distinct ones).

The product of its (nonzero) digits is 30481920, while the sum is 65.

The spelling of 85838177909 in words is "eighty-five billion, eight hundred thirty-eight million, one hundred seventy-seven thousand, nine hundred nine".