1311567645 has 16 divisors (see below), whose sum is σ = 2099509632. Its totient is φ = 699168960.

The previous prime is 1311567641. The next prime is 1311567667. The reversal of 1311567645 is 5467651131.

It is not a de Polignac number, because 1311567645 - 2² = 1311567641 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311567641) 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, 13440 + ... + 52950.

It is an arithmetic number, because the mean of its divisors is an integer number (131219352).

Almost surely, 2^1311567645 is an apocalyptic number.

1311567645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1311567645 is a deficient number, since it is larger than the sum of its proper divisors (787941987).

1311567645 is a wasteful number, since it uses less digits than its factorization.

1311567645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41732.

The product of its digits is 75600, while the sum is 39.

The square root of 1311567645 is about 36215.5718579729. The cubic root of 1311567645 is about 1094.6204685389.

The spelling of 1311567645 in words is "one billion, three hundred eleven million, five hundred sixty-seven thousand, six hundred forty-five".