1263497940682 has 4 divisors (see below), whose sum is σ = 1895246911026. Its totient is φ = 631748970340.

The previous prime is 1263497940671. The next prime is 1263497940713. The reversal of 1263497940682 is 2860497943621.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1233652268601 + 29845672081 = 1110699^2 + 172759^2 .

It is a super-2 number, since 2×1263497940682² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1263497940682.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315874485169 + ... + 315874485172.

Almost surely, 2^{1263497940682} is an apocalyptic number.

1263497940682 is a deficient number, since it is larger than the sum of its proper divisors (631748970344).

1263497940682 is an equidigital number, since it uses as much as digits as its factorization.

1263497940682 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 631748970343.

The product of its (nonzero) digits is 31352832, while the sum is 61.

The spelling of 1263497940682 in words is "one trillion, two hundred sixty-three billion, four hundred ninety-seven million, nine hundred forty thousand, six hundred eighty-two".