2133555778 has 8 divisors (see below), whose sum is σ = 3200754960. Its totient is φ = 1066637460.

The previous prime is 2133555773. The next prime is 2133555791. The reversal of 2133555778 is 8775553312.

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

It is not an unprimeable number, because it can be changed into a prime (2133555773) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50068 + ... + 82303.

It is an arithmetic number, because the mean of its divisors is an integer number (400094370).

Almost surely, 2^2133555778 is an apocalyptic number.

2133555778 is a deficient number, since it is larger than the sum of its proper divisors (1067199182).

2133555778 is a wasteful number, since it uses less digits than its factorization.

2133555778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140432.

The product of its digits is 882000, while the sum is 46.

The square root of 2133555778 is about 46190.4295065547. The cubic root of 2133555778 is about 1287.3639212450.

The spelling of 2133555778 in words is "two billion, one hundred thirty-three million, five hundred fifty-five thousand, seven hundred seventy-eight".