16781878711380 has 24 divisors (see below), whose sum is σ = 46989260392032. Its totient is φ = 4475167656352.

The previous prime is 16781878711333. The next prime is 16781878711441. The reversal of 16781878711380 is 8311787818761.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 139848989202 + ... + 139848989321.

It is an arithmetic number, because the mean of its divisors is an integer number (1957885849668).

Almost surely, 2^{16781878711380} is an apocalyptic number.

16781878711380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16781878711380 is an abundant number, since it is smaller than the sum of its proper divisors (30207381680652).

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

16781878711380 is a wasteful number, since it uses less digits than its factorization.

16781878711380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279697978535 (or 279697978533 counting only the distinct ones).

The product of its (nonzero) digits is 25288704, while the sum is 66.

The spelling of 16781878711380 in words is "sixteen trillion, seven hundred eighty-one billion, eight hundred seventy-eight million, seven hundred eleven thousand, three hundred eighty".