1851963966 has 32 divisors (see below), whose sum is σ = 4126982400. Its totient is φ = 615595320.

The previous prime is 1851963961. The next prime is 1851963989. The reversal of 1851963966 is 6693691581.

1851963966 is a `hidden beast` number, since 1 + 8 + 519 + 63 + 9 + 66 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1851963961) 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, 28380 + ... + 67151.

It is an arithmetic number, because the mean of its divisors is an integer number (128968200).

Almost surely, 2^1851963966 is an apocalyptic number.

1851963966 is an abundant number, since it is smaller than the sum of its proper divisors (2275018434).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1851963966 is a wasteful number, since it uses less digits than its factorization.

1851963966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95901 (or 95895 counting only the distinct ones).

The product of its digits is 2099520, while the sum is 54.

The square root of 1851963966 is about 43034.4509201640. The cubic root of 1851963966 is about 1228.0352809699.

The spelling of 1851963966 in words is "one billion, eight hundred fifty-one million, nine hundred sixty-three thousand, nine hundred sixty-six".