16209615755 has 4 divisors (see below), whose sum is σ = 19451538912. Its totient is φ = 12967692600.

The previous prime is 16209615713. The next prime is 16209615757. The reversal of 16209615755 is 55751690261.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55751690261 = 1151 ⋅48437611.

It is not a de Polignac number, because 16209615755 - 2¹⁰ = 16209614731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16209615757) 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, 1620961571 + ... + 1620961580.

It is an arithmetic number, because the mean of its divisors is an integer number (4862884728).

Almost surely, 2^16209615755 is an apocalyptic number.

16209615755 is a deficient number, since it is larger than the sum of its proper divisors (3241923157).

16209615755 is an equidigital number, since it uses as much as digits as its factorization.

16209615755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3241923156.

The product of its (nonzero) digits is 567000, while the sum is 47.

The spelling of 16209615755 in words is "sixteen billion, two hundred nine million, six hundred fifteen thousand, seven hundred fifty-five".