1263715327844 has 6 divisors (see below), whose sum is σ = 2211501823734. Its totient is φ = 631857663920.

The previous prime is 1263715327841. The next prime is 1263715327871. The reversal of 1263715327844 is 4487235173621.

It can be written as a sum of positive squares in only one way, i.e., 1224297990400 + 39417337444 = 1106480^2 + 198538^2 .

It is not an unprimeable number, because it can be changed into a prime (1263715327841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157964415977 + ... + 157964415984.

It is an arithmetic number, because the mean of its divisors is an integer number (368583637289).

Almost surely, 2^{1263715327844} is an apocalyptic number.

It is an amenable number.

1263715327844 is a deficient number, since it is larger than the sum of its proper divisors (947786495890).

1263715327844 is a wasteful number, since it uses less digits than its factorization.

1263715327844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315928831965 (or 315928831963 counting only the distinct ones).

The product of its digits is 6773760, while the sum is 53.

The spelling of 1263715327844 in words is "one trillion, two hundred sixty-three billion, seven hundred fifteen million, three hundred twenty-seven thousand, eight hundred forty-four".