1368668631 has 32 divisors (see below), whose sum is σ = 2072180736. Its totient is φ = 802665600.

The previous prime is 1368668621. The next prime is 1368668641.

1368668631 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (1368668621) and next prime (1368668641).

It is not a de Polignac number, because 1368668631 - 2⁵ = 1368668599 is a prime.

It is a super-2 number, since 2×1368668631² = 3746507642966828322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1368668621) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 118255 + ... + 129311.

It is an arithmetic number, because the mean of its divisors is an integer number (64755648).

Almost surely, 2^1368668631 is an apocalyptic number.

1368668631 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1368668631 is a deficient number, since it is larger than the sum of its proper divisors (703512105).

1368668631 is a wasteful number, since it uses less digits than its factorization.

1368668631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11124 (or 11102 counting only the distinct ones).

The product of its digits is 746496, while the sum is 48.

The square root of 1368668631 is about 36995.5217695331. The cubic root of 1368668631 is about 1110.2806505671.

The spelling of 1368668631 in words is "one billion, three hundred sixty-eight million, six hundred sixty-eight thousand, six hundred thirty-one".