16044779520 has 1728 divisors, whose sum is σ = 78651518400. Its totient is φ = 2972712960.

The previous prime is 16044779497. The next prime is 16044779521. The reversal of 16044779520 is 2597744061.

16044779520 is a `hidden beast` number, since 16 + 0 + 4 + 47 + 79 + 520 = 666.

It is a super-2 number, since 2×16044779520² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (16044779521) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 844462071 + ... + 844462089.

It is an arithmetic number, because the mean of its divisors is an integer number (45515925).

Almost surely, 2^16044779520 is an apocalyptic number.

16044779520 is a gapful number since it is divisible by the number (10) 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 16044779520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39325759200).

16044779520 is an abundant number, since it is smaller than the sum of its proper divisors (62606738880).

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

16044779520 is a wasteful number, since it uses less digits than its factorization.

16044779520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94 (or 64 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 45.

The spelling of 16044779520 in words is "sixteen billion, forty-four million, seven hundred seventy-nine thousand, five hundred twenty".