1361991168 has 60 divisors (see below), whose sum is σ = 3930812028. Its totient is φ = 453995520.

The previous prime is 1361991151. The next prime is 1361991199. The reversal of 1361991168 is 8611991631.

1361991168 is a `hidden beast` number, since 13 + 619 + 9 + 1 + 16 + 8 = 666.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 143178 + ... + 152393.

Almost surely, 2^1361991168 is an apocalyptic number.

1361991168 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1361991168 is an abundant number, since it is smaller than the sum of its proper divisors (2568820860).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1361991168 is an equidigital number, since it uses as much as digits as its factorization.

1361991168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295595 (or 295576 counting only the distinct ones).

The product of its digits is 69984, while the sum is 45.

The square root of 1361991168 is about 36905.1645166364. The cubic root of 1361991168 is about 1108.4720930886.

The spelling of 1361991168 in words is "one billion, three hundred sixty-one million, nine hundred ninety-one thousand, one hundred sixty-eight".