16181273376 has 144 divisors (see below), whose sum is σ = 47751795000. Its totient is φ = 5191409664.

The previous prime is 16181273371. The next prime is 16181273393. The reversal of 16181273376 is 67337218161.

16181273376 is a `hidden beast` number, since 1 + 6 + 1 + 8 + 1 + 273 + 376 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 7409077776 + 8772195600 = 86076^2 + 93660^2 .

It is a tau number, because it is divible by the number of its divisors (144).

It is not an unprimeable number, because it can be changed into a prime (16181273371) 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, 2811750 + ... + 2817498.

Almost surely, 2^16181273376 is an apocalyptic number.

16181273376 is a gapful number since it is divisible by the number (16) 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 16181273376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23875897500).

16181273376 is an abundant number, since it is smaller than the sum of its proper divisors (31570521624).

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

16181273376 is a wasteful number, since it uses less digits than its factorization.

16181273376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6131 (or 6120 counting only the distinct ones).

The product of its digits is 254016, while the sum is 45.

The spelling of 16181273376 in words is "sixteen billion, one hundred eighty-one million, two hundred seventy-three thousand, three hundred seventy-six".