16501378932 has 72 divisors (see below), whose sum is σ = 44089805760. Its totient is φ = 5189287680.

The previous prime is 16501378931. The next prime is 16501378961. The reversal of 16501378932 is 23987310561.

16501378932 is a `hidden beast` number, since 1 + 6 + 501 + 37 + 89 + 32 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16501378931) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 114793 + ... + 214895.

Almost surely, 2^16501378932 is an apocalyptic number.

16501378932 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16501378932, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22044902880).

16501378932 is an abundant number, since it is smaller than the sum of its proper divisors (27588426828).

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

16501378932 is a wasteful number, since it uses less digits than its factorization.

16501378932 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100373 (or 100368 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The spelling of 16501378932 in words is "sixteen billion, five hundred one million, three hundred seventy-eight thousand, nine hundred thirty-two".