16781070864 has 80 divisors (see below), whose sum is σ = 47206353600. Its totient is φ = 5116543488.

The previous prime is 16781070863. The next prime is 16781070899. The reversal of 16781070864 is 46807018761.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (16781070863) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 290799 + ... + 343694.

It is an arithmetic number, because the mean of its divisors is an integer number (590079420).

Almost surely, 2^16781070864 is an apocalyptic number.

It is an amenable number.

16781070864 is an abundant number, since it is smaller than the sum of its proper divisors (30425282736).

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

16781070864 is a wasteful number, since it uses less digits than its factorization.

16781070864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 634552 (or 634546 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 48.

The spelling of 16781070864 in words is "sixteen billion, seven hundred eighty-one million, seventy thousand, eight hundred sixty-four".