1311373845 has 24 divisors (see below), whose sum is σ = 2288113152. Its totient is φ = 694764000.

The previous prime is 1311373813. The next prime is 1311373853. The reversal of 1311373845 is 5483731131.

It is not a de Polignac number, because 1311373845 - 2⁵ = 1311373813 is a prime.

It is a super-2 number, since 2×1311373845² = 3439402722700168050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 89701 + ... + 103290.

It is an arithmetic number, because the mean of its divisors is an integer number (95338048).

Almost surely, 2^1311373845 is an apocalyptic number.

1311373845 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1311373845 is a deficient number, since it is larger than the sum of its proper divisors (976739307).

1311373845 is a wasteful number, since it uses less digits than its factorization.

1311373845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193153 (or 193150 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 1311373845 is about 36212.8961145059. The cubic root of 1311373845 is about 1094.5665514073.

The spelling of 1311373845 in words is "one billion, three hundred eleven million, three hundred seventy-three thousand, eight hundred forty-five".