1318155671 has 16 divisors (see below), whose sum is σ = 1529285184. Its totient is φ = 1112776704.

The previous prime is 1318155661. The next prime is 1318155679. The reversal of 1318155671 is 1765518131.

It is a cyclic number.

It is not a de Polignac number, because 1318155671 - 2⁶ = 1318155607 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1318155679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 477431 + ... + 480183.

It is an arithmetic number, because the mean of its divisors is an integer number (95580324).

Almost surely, 2^1318155671 is an apocalyptic number.

1318155671 is a deficient number, since it is larger than the sum of its proper divisors (211129513).

1318155671 is an equidigital number, since it uses as much as digits as its factorization.

1318155671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3770.

The product of its digits is 25200, while the sum is 38.

The square root of 1318155671 is about 36306.4136345082. The cubic root of 1318155671 is about 1096.4501739831.

The spelling of 1318155671 in words is "one billion, three hundred eighteen million, one hundred fifty-five thousand, six hundred seventy-one".