2139568378 has 8 divisors (see below), whose sum is σ = 3378265920. Its totient is φ = 1013479740.

The previous prime is 2139568363. The next prime is 2139568381. The reversal of 2139568378 is 8738659312.

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

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, 28152178 + ... + 28152253.

It is an arithmetic number, because the mean of its divisors is an integer number (422283240).

Almost surely, 2^2139568378 is an apocalyptic number.

2139568378 is a deficient number, since it is larger than the sum of its proper divisors (1238697542).

2139568378 is a wasteful number, since it uses less digits than its factorization.

2139568378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56304452.

The product of its digits is 2177280, while the sum is 52.

The square root of 2139568378 is about 46255.4686280444. The cubic root of 2139568378 is about 1288.5720991055.

The spelling of 2139568378 in words is "two billion, one hundred thirty-nine million, five hundred sixty-eight thousand, three hundred seventy-eight".