16720101355 has 4 divisors (see below), whose sum is σ = 20064121632. Its totient is φ = 13376081080.

The previous prime is 16720101353. The next prime is 16720101373. The reversal of 16720101355 is 55310102761.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55310102761 = 235181².

It is not a de Polignac number, because 16720101355 - 2¹ = 16720101353 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16720101353) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1672010131 + ... + 1672010140.

It is an arithmetic number, because the mean of its divisors is an integer number (5016030408).

Almost surely, 2^16720101355 is an apocalyptic number.

16720101355 is a deficient number, since it is larger than the sum of its proper divisors (3344020277).

16720101355 is an equidigital number, since it uses as much as digits as its factorization.

16720101355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3344020276.

The product of its (nonzero) digits is 6300, while the sum is 31.

The spelling of 16720101355 in words is "sixteen billion, seven hundred twenty million, one hundred one thousand, three hundred fifty-five".