16439152720 has 20 divisors (see below), whose sum is σ = 38221030260. Its totient is φ = 6575661056.

The previous prime is 16439152679. The next prime is 16439152747. The reversal of 16439152720 is 2725193461.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1883212816 + 14555939904 = 43396^2 + 120648^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102744625 + ... + 102744784.

It is an arithmetic number, because the mean of its divisors is an integer number (1911051513).

Almost surely, 2^16439152720 is an apocalyptic number.

16439152720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16439152720 is an abundant number, since it is smaller than the sum of its proper divisors (21781877540).

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

16439152720 is a wasteful number, since it uses less digits than its factorization.

16439152720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205489422 (or 205489416 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 40.

The spelling of 16439152720 in words is "sixteen billion, four hundred thirty-nine million, one hundred fifty-two thousand, seven hundred twenty".