785065881601 has 4 divisors (see below), whose sum is σ = 789766875072. Its totient is φ = 780364888132.

The previous prime is 785065881583. The next prime is 785065881617. The reversal of 785065881601 is 106188560587.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 785065881601 - 2²⁵ = 785032327169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (785065881661) 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, 2350496485 + ... + 2350496818.

It is an arithmetic number, because the mean of its divisors is an integer number (197441718768).

Almost surely, 2^785065881601 is an apocalyptic number.

It is an amenable number.

785065881601 is a deficient number, since it is larger than the sum of its proper divisors (4700993471).

785065881601 is a wasteful number, since it uses less digits than its factorization.

785065881601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4700993470.

The product of its (nonzero) digits is 3225600, while the sum is 55.

The spelling of 785065881601 in words is "seven hundred eighty-five billion, sixty-five million, eight hundred eighty-one thousand, six hundred one".