16864353378 has 12 divisors (see below), whose sum is σ = 36539432358. Its totient is φ = 5621451120.

The previous prime is 16864353377. The next prime is 16864353397. The reversal of 16864353378 is 87335346861.

16864353378 is a `hidden beast` number, since 1 + 68 + 6 + 43 + 533 + 7 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 16851414969 + 12938409 = 129813^2 + 3597^2 .

It is not an unprimeable number, because it can be changed into a prime (16864353377) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 468454243 + ... + 468454278.

Almost surely, 2^16864353378 is an apocalyptic number.

16864353378 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

16864353378 is an abundant number, since it is smaller than the sum of its proper divisors (19675078980).

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

16864353378 is a wasteful number, since it uses less digits than its factorization.

16864353378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 936908529 (or 936908526 counting only the distinct ones).

The product of its digits is 8709120, while the sum is 54.

The spelling of 16864353378 in words is "sixteen billion, eight hundred sixty-four million, three hundred fifty-three thousand, three hundred seventy-eight".