16432304432778 has 192 divisors, whose sum is σ = 38831357335680. Its totient is φ = 4992039714816.

The previous prime is 16432304432759. The next prime is 16432304432881. The reversal of 16432304432778 is 87723440323461.

16432304432778 is a `hidden beast` number, since 1 + 6 + 4 + 3 + 2 + 304 + 4 + 327 + 7 + 8 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 6913042326 + ... + 6913044702.

It is an arithmetic number, because the mean of its divisors is an integer number (202246652790).

Almost surely, 2^{16432304432778} is an apocalyptic number.

16432304432778 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 16432304432778, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19415678667840).

16432304432778 is an abundant number, since it is smaller than the sum of its proper divisors (22399052902902).

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

16432304432778 is a wasteful number, since it uses less digits than its factorization.

16432304432778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3621 (or 3618 counting only the distinct ones).

The product of its (nonzero) digits is 16257024, while the sum is 54.

The spelling of 16432304432778 in words is "sixteen trillion, four hundred thirty-two billion, three hundred four million, four hundred thirty-two thousand, seven hundred seventy-eight".