1373263668 has 144 divisors (see below), whose sum is σ = 4273790976. Its totient is φ = 363147840.

The previous prime is 1373263649. The next prime is 1373263669. The reversal of 1373263668 is 8663623731.

1373263668 is a `hidden beast` number, since 1 + 3 + 7 + 3 + 2 + 636 + 6 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1373263669) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 175855 + ... + 183497.

It is an arithmetic number, because the mean of its divisors is an integer number (29679104).

Almost surely, 2^1373263668 is an apocalyptic number.

1373263668 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1373263668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2136895488).

1373263668 is an abundant number, since it is smaller than the sum of its proper divisors (2900527308).

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

1373263668 is a wasteful number, since it uses less digits than its factorization.

1373263668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7714 (or 7709 counting only the distinct ones).

The product of its digits is 653184, while the sum is 45.

The square root of 1373263668 is about 37057.5723435845. The cubic root of 1373263668 is about 1111.5217792985.

The spelling of 1373263668 in words is "one billion, three hundred seventy-three million, two hundred sixty-three thousand, six hundred sixty-eight".