1283992661956 has 9 divisors (see below), whose sum is σ = 2246991124399. Its totient is φ = 641995197844.

The previous prime is 1283992661893. The next prime is 1283992662011. The reversal of 1283992661956 is 6591662993821.

The square root of 1283992661956 is 1133134.

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

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1283992661891 and 1283992661900.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1982985 + ... + 2549551.

Almost surely, 2^{1283992661956} is an apocalyptic number.

1283992661956 is the 1133134-th square number.

It is an amenable number.

1283992661956 is a deficient number, since it is larger than the sum of its proper divisors (962998462443).

1283992661956 is an frugal number, since it uses more digits than its factorization.

1283992661956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1133138 (or 566569 counting only the distinct ones).

The product of its digits is 75582720, while the sum is 67.

The spelling of 1283992661956 in words is "one trillion, two hundred eighty-three billion, nine hundred ninety-two million, six hundred sixty-one thousand, nine hundred fifty-six".