1318199955 has 16 divisors (see below), whose sum is σ = 2220126720. Its totient is φ = 666037728.

The previous prime is 1318199903. The next prime is 1318199957. The reversal of 1318199955 is 5599918131.

It is not a de Polignac number, because 1318199955 - 2²⁰ = 1317151379 is a prime.

It is a super-2 number, since 2×1318199955² = 3475302242724004050, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1318199898 and 1318199907.

It is not an unprimeable number, because it can be changed into a prime (1318199957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2312347 + ... + 2312916.

It is an arithmetic number, because the mean of its divisors is an integer number (138757920).

Almost surely, 2^1318199955 is an apocalyptic number.

1318199955 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1318199955 is a deficient number, since it is larger than the sum of its proper divisors (901926765).

1318199955 is a wasteful number, since it uses less digits than its factorization.

1318199955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4625290.

The product of its digits is 437400, while the sum is 51.

The square root of 1318199955 is about 36307.0234940844. The cubic root of 1318199955 is about 1096.4624524155.

The spelling of 1318199955 in words is "one billion, three hundred eighteen million, one hundred ninety-nine thousand, nine hundred fifty-five".