1263542357476 has 81 divisors (see below), whose sum is σ = 2732996812329. Its totient is φ = 509556233088.

The previous prime is 1263542357423. The next prime is 1263542357507. The reversal of 1263542357476 is 6747532453621.

The square root of 1263542357476 is 1124074.

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

It can be written as a sum of positive squares in only one way, i.e., 983726748900 + 279815608576 = 991830^2 + 528976^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 267527251 + ... + 267531973.

Almost surely, 2^{1263542357476} is an apocalyptic number.

1263542357476 is the 1124074-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1263542357476

1263542357476 is an abundant number, since it is smaller than the sum of its proper divisors (1469454454853).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1263542357476 is an frugal number, since it uses more digits than its factorization.

1263542357476 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9498 (or 4749 counting only the distinct ones).

The product of its digits is 25401600, while the sum is 55.

The spelling of 1263542357476 in words is "one trillion, two hundred sixty-three billion, five hundred forty-two million, three hundred fifty-seven thousand, four hundred seventy-six".