16129389720 has 128 divisors (see below), whose sum is σ = 49572000000. Its totient is φ = 4197152256.

The previous prime is 16129389719. The next prime is 16129389781. The reversal of 16129389720 is 2798392161.

It is a self number, because there is not a number n which added to its sum of digits gives 16129389720.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 850906 + ... + 869654.

It is an arithmetic number, because the mean of its divisors is an integer number (387281250).

Almost surely, 2^16129389720 is an apocalyptic number.

16129389720 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 16129389720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24786000000).

16129389720 is an abundant number, since it is smaller than the sum of its proper divisors (33442610280).

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

16129389720 is a wasteful number, since it uses less digits than its factorization.

16129389720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18937 (or 18933 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 48.

The spelling of 16129389720 in words is "sixteen billion, one hundred twenty-nine million, three hundred eighty-nine thousand, seven hundred twenty".