61856873 has 12 divisors (see below), whose sum is σ = 69147648. Its totient is φ = 55252080.

The previous prime is 61856857. The next prime is 61856881. The reversal of 61856873 is 37865816.

It is not a de Polignac number, because 61856873 - 2⁴ = 61856857 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (61856843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 665 + ... + 11142.

It is an arithmetic number, because the mean of its divisors is an integer number (5762304).

Almost surely, 2^61856873 is an apocalyptic number.

It is an amenable number.

61856873 is a deficient number, since it is larger than the sum of its proper divisors (7290775).

61856873 is a wasteful number, since it uses less digits than its factorization.

61856873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11864 (or 11851 counting only the distinct ones).

The product of its digits is 241920, while the sum is 44.

The square root of 61856873 is about 7864.9140491171. The cubic root of 61856873 is about 395.4843665489.

The spelling of 61856873 in words is "sixty-one million, eight hundred fifty-six thousand, eight hundred seventy-three".