1986278697316 has 27 divisors (see below), whose sum is σ = 3511247450347. Its totient is φ = 983165350400.

The previous prime is 1986278697301. The next prime is 1986278697323. The reversal of 1986278697316 is 6137968726891.

The square root of 1986278697316 is 1409354.

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

It can be written as a sum of positive squares in 4 ways, for example, as 133130116900 + 1853148580416 = 364870^2 + 1361304^2 .

It is a super-2 number, since 2×1986278697316² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 284686020 + ... + 284692996.

Almost surely, 2^{1986278697316} is an apocalyptic number.

1986278697316 is the 1409354-th square number.

It is an amenable number.

1986278697316 is a deficient number, since it is larger than the sum of its proper divisors (1524968753031).

1986278697316 is an frugal number, since it uses more digits than its factorization.

1986278697316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14160 (or 7080 counting only the distinct ones).

The product of its digits is 329204736, while the sum is 73.

The spelling of 1986278697316 in words is "one trillion, nine hundred eighty-six billion, two hundred seventy-eight million, six hundred ninety-seven thousand, three hundred sixteen".