1313680645 has 16 divisors (see below), whose sum is σ = 1630563840. Its totient is φ = 1014984000.

The previous prime is 1313680633. The next prime is 1313680649. The reversal of 1313680645 is 5460863131.

It is not a de Polignac number, because 1313680645 - 2⁹ = 1313680133 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1313680649) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70570 + ... + 87220.

It is an arithmetic number, because the mean of its divisors is an integer number (101910240).

Almost surely, 2^1313680645 is an apocalyptic number.

It is an amenable number.

1313680645 is a deficient number, since it is larger than the sum of its proper divisors (316883195).

1313680645 is a wasteful number, since it uses less digits than its factorization.

1313680645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17196.

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 1313680645 is about 36244.7326517937. The cubic root of 1313680645 is about 1095.2079822892.

The spelling of 1313680645 in words is "one billion, three hundred thirteen million, six hundred eighty thousand, six hundred forty-five".