16072021116520 has 32 divisors (see below), whose sum is σ = 36241176760200. Its totient is φ = 6414741024768.

The previous prime is 16072021116499. The next prime is 16072021116521. The reversal of 16072021116520 is 2561112027061.

It can be written as a sum of positive squares in 4 ways, for example, as 15797715433956 + 274305682564 = 3974634^2 + 523742^2 .

It is not an unprimeable number, because it can be changed into a prime (16072021116521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 439588425 + ... + 439624984.

Almost surely, 2^{16072021116520} is an apocalyptic number.

16072021116520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16072021116520 is an abundant number, since it is smaller than the sum of its proper divisors (20169155643680).

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

16072021116520 is a wasteful number, since it uses less digits than its factorization.

16072021116520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 879213877 (or 879213873 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 34.

The spelling of 16072021116520 in words is "sixteen trillion, seventy-two billion, twenty-one million, one hundred sixteen thousand, five hundred twenty".