2138633178 has 16 divisors (see below), whose sum is σ = 4666108896. Its totient is φ = 648070640.

The previous prime is 2138633143. The next prime is 2138633183. The reversal of 2138633178 is 8713368312.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16201701 + ... + 16201832.

It is an arithmetic number, because the mean of its divisors is an integer number (291631806).

Almost surely, 2^2138633178 is an apocalyptic number.

2138633178 is an abundant number, since it is smaller than the sum of its proper divisors (2527475718).

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

2138633178 is a wasteful number, since it uses less digits than its factorization.

2138633178 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32403549.

The product of its digits is 145152, while the sum is 42.

The square root of 2138633178 is about 46245.3584481729. The cubic root of 2138633178 is about 1288.3843278616.

The spelling of 2138633178 in words is "two billion, one hundred thirty-eight million, six hundred thirty-three thousand, one hundred seventy-eight".