2156673834 has 48 divisors (see below), whose sum is σ = 5484680448. Its totient is φ = 599537376.

The previous prime is 2156673811. The next prime is 2156673859. The reversal of 2156673834 is 4383766512.

2156673834 is a `hidden beast` number, since 2 + 1 + 566 + 7 + 3 + 83 + 4 = 666.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2156673834.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 226642 + ... + 235965.

It is an arithmetic number, because the mean of its divisors is an integer number (114264176).

Almost surely, 2^2156673834 is an apocalyptic number.

2156673834 is an abundant number, since it is smaller than the sum of its proper divisors (3328006614).

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

2156673834 is a wasteful number, since it uses less digits than its factorization.

2156673834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 462659 (or 462656 counting only the distinct ones).

The product of its digits is 725760, while the sum is 45.

The square root of 2156673834 is about 46440.0025193798. The cubic root of 2156673834 is about 1291.9969539398.

The spelling of 2156673834 in words is "two billion, one hundred fifty-six million, six hundred seventy-three thousand, eight hundred thirty-four".