1263660722344 has 8 divisors (see below), whose sum is σ = 2369363854410. Its totient is φ = 631830361168.

The previous prime is 1263660722327. The next prime is 1263660722369. The reversal of 1263660722344 is 4432270663621.

It can be written as a sum of positive squares in only one way, i.e., 1248891181444 + 14769540900 = 1117538^2 + 121530^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 1263660722294 and 1263660722303.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78978795139 + ... + 78978795154.

Almost surely, 2^{1263660722344} is an apocalyptic number.

It is an amenable number.

1263660722344 is a deficient number, since it is larger than the sum of its proper divisors (1105703132066).

1263660722344 is a wasteful number, since it uses less digits than its factorization.

1263660722344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157957590299 (or 157957590295 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 46.

The spelling of 1263660722344 in words is "one trillion, two hundred sixty-three billion, six hundred sixty million, seven hundred twenty-two thousand, three hundred forty-four".