2978371833616 has 15 divisors (see below), whose sum is σ = 5770608802581. Its totient is φ = 1489182465216.

The previous prime is 2978371833611. The next prime is 2978371833623. The reversal of 2978371833616 is 6163381738792.

The square root of 2978371833616 is 1725796.

It is a perfect power (a square), and thus also a powerful number.

2978371833616 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 2250012000016 + 728359833600 = 1500004^2 + 853440^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2978371833611) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 6687460 + ... + 7118908.

Almost surely, 2^{2978371833616} is an apocalyptic number.

2978371833616 is the 1725796-th square number.

It is an amenable number.

2978371833616 is a deficient number, since it is larger than the sum of its proper divisors (2792236968965).

2978371833616 is an frugal number, since it uses more digits than its factorization.

2978371833616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 862906 (or 431451 counting only the distinct ones).

The product of its digits is 54867456, while the sum is 64.

Multiplying 2978371833616 by its sum of digits (64), we get a square (190615797351424 = 13806368²).

The spelling of 2978371833616 in words is "two trillion, nine hundred seventy-eight billion, three hundred seventy-one million, eight hundred thirty-three thousand, six hundred sixteen".