2138746915 has 4 divisors (see below), whose sum is σ = 2566496304. Its totient is φ = 1710997528.

The previous prime is 2138746783. The next prime is 2138746957. The reversal of 2138746915 is 5196478312.

2138746915 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2138746915 - 2¹⁵ = 2138714147 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 213874687 + ... + 213874696.

It is an arithmetic number, because the mean of its divisors is an integer number (641624076).

Almost surely, 2^2138746915 is an apocalyptic number.

2138746915 is a deficient number, since it is larger than the sum of its proper divisors (427749389).

2138746915 is an equidigital number, since it uses as much as digits as its factorization.

2138746915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427749388.

The product of its digits is 362880, while the sum is 46.

The square root of 2138746915 is about 46246.5881444242. The cubic root of 2138746915 is about 1288.4071671174.

The spelling of 2138746915 in words is "two billion, one hundred thirty-eight million, seven hundred forty-six thousand, nine hundred fifteen".