785816872861 has 8 divisors (see below), whose sum is σ = 842065991424. Its totient is φ = 730681598400.

The previous prime is 785816872829. The next prime is 785816872879. The reversal of 785816872861 is 168278618587.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 785816872861 - 2⁵ = 785816872829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (785816842861) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 278459565 + ... + 278462386.

It is an arithmetic number, because the mean of its divisors is an integer number (105258248928).

Almost surely, 2^785816872861 is an apocalyptic number.

It is an amenable number.

785816872861 is a deficient number, since it is larger than the sum of its proper divisors (56249118563).

785816872861 is a wasteful number, since it uses less digits than its factorization.

785816872861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 556922051.

The product of its digits is 72253440, while the sum is 67.

The spelling of 785816872861 in words is "seven hundred eighty-five billion, eight hundred sixteen million, eight hundred seventy-two thousand, eight hundred sixty-one".