16201216655 has 16 divisors (see below), whose sum is σ = 20939917824. Its totient is φ = 11962283520.

The previous prime is 16201216613. The next prime is 16201216693. The reversal of 16201216655 is 55661210261.

It is a Cunningham number, because it is equal to 127284²-1.

It is not a de Polignac number, because 16201216655 - 2¹⁴ = 16201200271 is a prime.

It is a super-2 number, since 2×16201216655² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 623687 + ... + 649143.

It is an arithmetic number, because the mean of its divisors is an integer number (1308744864).

Almost surely, 2^16201216655 is an apocalyptic number.

16201216655 is a deficient number, since it is larger than the sum of its proper divisors (4738701169).

16201216655 is a wasteful number, since it uses less digits than its factorization.

16201216655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35266.

The product of its (nonzero) digits is 21600, while the sum is 35.

The spelling of 16201216655 in words is "sixteen billion, two hundred one million, two hundred sixteen thousand, six hundred fifty-five".