2138746366 has 4 divisors (see below), whose sum is σ = 3208119552. Its totient is φ = 1069373182.

The previous prime is 2138746349. The next prime is 2138746369. The reversal of 2138746366 is 6636478312.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2138746369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 534686590 + ... + 534686593.

It is an arithmetic number, because the mean of its divisors is an integer number (802029888).

Almost surely, 2^2138746366 is an apocalyptic number.

2138746366 is a deficient number, since it is larger than the sum of its proper divisors (1069373186).

2138746366 is a wasteful number, since it uses less digits than its factorization.

2138746366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1069373185.

The product of its digits is 870912, while the sum is 46.

The square root of 2138746366 is about 46246.5822088509. The cubic root of 2138746366 is about 1288.4070568759.

The spelling of 2138746366 in words is "two billion, one hundred thirty-eight million, seven hundred forty-six thousand, three hundred sixty-six".