2742139240394 has 8 divisors (see below), whose sum is σ = 4224376667748. Its totient is φ = 1334013684480.

The previous prime is 2742139240339. The next prime is 2742139240397. The reversal of 2742139240394 is 4930429312472.

It can be written as a sum of positive squares in 2 ways, for example, as 2729477364769 + 12661875625 = 1652113^2 + 112525^2 .

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

It is a super-2 number, since 2×2742139240394² (a number of 26 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2742139240397) 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, 18527967767 + ... + 18527967914.

Almost surely, 2^{2742139240394} is an apocalyptic number.

2742139240394 is a deficient number, since it is larger than the sum of its proper divisors (1482237427354).

2742139240394 is a wasteful number, since it uses less digits than its factorization.

2742139240394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37055935720.

The product of its (nonzero) digits is 2612736, while the sum is 50.

The spelling of 2742139240394 in words is "two trillion, seven hundred forty-two billion, one hundred thirty-nine million, two hundred forty thousand, three hundred ninety-four".