1311563030642 has 4 divisors (see below), whose sum is σ = 1967344545966. Its totient is φ = 655781515320.

The previous prime is 1311563030633. The next prime is 1311563030663. The reversal of 1311563030642 is 2460303651131.

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., 862299817201 + 449263213441 = 928601^2 + 670271^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327890757659 + ... + 327890757662.

Almost surely, 2^{1311563030642} is an apocalyptic number.

1311563030642 is a deficient number, since it is larger than the sum of its proper divisors (655781515324).

1311563030642 is an equidigital number, since it uses as much as digits as its factorization.

1311563030642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 655781515323.

The product of its (nonzero) digits is 38880, while the sum is 35.

Adding to 1311563030642 its reverse (2460303651131), we get a palindrome (3771866681773).

The spelling of 1311563030642 in words is "one trillion, three hundred eleven billion, five hundred sixty-three million, thirty thousand, six hundred forty-two".