85011861 has 32 divisors (see below), whose sum is σ = 128563200. Its totient is φ = 49518080.

The previous prime is 85011859. The next prime is 85011881. The reversal of 85011861 is 16811058.

85011861 = T₃₉₂₆ + T₃₉₂₇ + ... + T₃₉₃₆.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 85011861 - 2¹ = 85011859 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85011881) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 91045 + ... + 91973.

It is an arithmetic number, because the mean of its divisors is an integer number (4017600).

Almost surely, 2^85011861 is an apocalyptic number.

It is an amenable number.

85011861 is a deficient number, since it is larger than the sum of its proper divisors (43551339).

85011861 is a wasteful number, since it uses less digits than its factorization.

85011861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1049.

The product of its (nonzero) digits is 1920, while the sum is 30.

The square root of 85011861 is about 9220.1876878944. The cubic root of 85011861 is about 439.7034175575.

The spelling of 85011861 in words is "eighty-five million, eleven thousand, eight hundred sixty-one".