1361323166500 has 96 divisors (see below), whose sum is σ = 3251349803520. Its totient is φ = 493815456000.

The previous prime is 1361323166479. The next prime is 1361323166521. The reversal of 1361323166500 is 56613231631.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1361323166479) and next prime (1361323166521).

It is a self number, because there is not a number n which added to its sum of digits gives 1361323166500.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1946917 + ... + 2552083.

It is an arithmetic number, because the mean of its divisors is an integer number (33868227120).

Almost surely, 2^{1361323166500} is an apocalyptic number.

1361323166500 is a gapful number since it is divisible by the number (10) 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 1361323166500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1625674901760).

1361323166500 is an abundant number, since it is smaller than the sum of its proper divisors (1890026637020).

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

1361323166500 is a wasteful number, since it uses less digits than its factorization.

1361323166500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 605606 (or 605594 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 37.

The spelling of 1361323166500 in words is "one trillion, three hundred sixty-one billion, three hundred twenty-three million, one hundred sixty-six thousand, five hundred".