845916681 has 8 divisors (see below), whose sum is σ = 1158372544. Its totient is φ = 548702640.

The previous prime is 845916679. The next prime is 845916691. The reversal of 845916681 is 186619548.

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

It is not a de Polignac number, because 845916681 - 2¹ = 845916679 is a prime.

It is a super-2 number, since 2×845916681² = 1431150062388111522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 845916681.

It is not an unprimeable number, because it can be changed into a prime (845916691) 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, 3810325 + ... + 3810546.

It is an arithmetic number, because the mean of its divisors is an integer number (144796568).

Almost surely, 2^845916681 is an apocalyptic number.

It is an amenable number.

845916681 is a deficient number, since it is larger than the sum of its proper divisors (312455863).

845916681 is a wasteful number, since it uses less digits than its factorization.

845916681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7620911.

The product of its digits is 414720, while the sum is 48.

The square root of 845916681 is about 29084.6468261177. The cubic root of 845916681 is about 945.7489396148.

The spelling of 845916681 in words is "eight hundred forty-five million, nine hundred sixteen thousand, six hundred eighty-one".