845211861 has 16 divisors (see below), whose sum is σ = 1348486720. Its totient is φ = 520130160.

The previous prime is 845211859. The next prime is 845211881. The reversal of 845211861 is 168112548.

It is not a de Polignac number, because 845211861 - 2¹ = 845211859 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (845211811) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1203655 + ... + 1204356.

It is an arithmetic number, because the mean of its divisors is an integer number (84280420).

Almost surely, 2^845211861 is an apocalyptic number.

It is an amenable number.

845211861 is a deficient number, since it is larger than the sum of its proper divisors (503274859).

845211861 is a wasteful number, since it uses less digits than its factorization.

845211861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2408033 (or 2408027 counting only the distinct ones).

The product of its digits is 15360, while the sum is 36.

The square root of 845211861 is about 29072.5275990926. The cubic root of 845211861 is about 945.4861997961.

The spelling of 845211861 in words is "eight hundred forty-five million, two hundred eleven thousand, eight hundred sixty-one".