1068555513 has 4 divisors (see below), whose sum is σ = 1424740688. Its totient is φ = 712370340.

The previous prime is 1068555493. The next prime is 1068555517. The reversal of 1068555513 is 3155558601.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1068555513 - 2¹⁰ = 1068554489 is a prime.

It is a super-2 number, since 2×1068555513² = 2283621768725386338, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1068555517) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 178092583 + ... + 178092588.

It is an arithmetic number, because the mean of its divisors is an integer number (356185172).

Almost surely, 2^1068555513 is an apocalyptic number.

It is an amenable number.

1068555513 is a deficient number, since it is larger than the sum of its proper divisors (356185175).

1068555513 is an equidigital number, since it uses as much as digits as its factorization.

1068555513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356185174.

The product of its (nonzero) digits is 90000, while the sum is 39.

The square root of 1068555513 is about 32688.7673826958. The cubic root of 1068555513 is about 1022.3486545365.

The spelling of 1068555513 in words is "one billion, sixty-eight million, five hundred fifty-five thousand, five hundred thirteen".