845161677 has 12 divisors (see below), whose sum is σ = 1224066844. Its totient is φ = 561928320.

The previous prime is 845161673. The next prime is 845161687. The reversal of 845161677 is 776161548.

It can be written as a sum of positive squares in 2 ways, for example, as 163481796 + 681679881 = 12786^2 + 26109^2 .

It is not a de Polignac number, because 845161677 - 2² = 845161673 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 (845161673) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 122524 + ... + 129237.

Almost surely, 2^845161677 is an apocalyptic number.

It is an amenable number.

845161677 is a deficient number, since it is larger than the sum of its proper divisors (378905167).

845161677 is a wasteful number, since it uses less digits than its factorization.

845161677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252140 (or 252137 counting only the distinct ones).

The product of its digits is 282240, while the sum is 45.

The square root of 845161677 is about 29071.6645034301. The cubic root of 845161677 is about 945.4674868474.

The spelling of 845161677 in words is "eight hundred forty-five million, one hundred sixty-one thousand, six hundred seventy-seven".