2178321315802 has 16 divisors (see below), whose sum is σ = 3372999162624. Its totient is φ = 1053990648000.

The previous prime is 2178321315769. The next prime is 2178321315811. The reversal of 2178321315802 is 2085131238712.

It is a super-2 number, since 2×2178321315802² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1291602 + ... + 2454562.

It is an arithmetic number, because the mean of its divisors is an integer number (210812447664).

Almost surely, 2^{2178321315802} is an apocalyptic number.

2178321315802 is a deficient number, since it is larger than the sum of its proper divisors (1194677846822).

2178321315802 is a wasteful number, since it uses less digits than its factorization.

2178321315802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1193205.

The product of its (nonzero) digits is 161280, while the sum is 43.

The spelling of 2178321315802 in words is "two trillion, one hundred seventy-eight billion, three hundred twenty-one million, three hundred fifteen thousand, eight hundred two".