216132508577 has 4 divisors (see below), whose sum is σ = 216137443860. Its totient is φ = 216127573296.

The previous prime is 216132508573. The next prime is 216132508621. The reversal of 216132508577 is 775805231612.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3841024576 + 212291484001 = 61976^2 + 460751^2 .

It is a cyclic number.

It is not a de Polignac number, because 216132508577 - 2² = 216132508573 is a prime.

It is a super-2 number, since 2×216132508577² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216132508573) 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, 2401358 + ... + 2489735.

It is an arithmetic number, because the mean of its divisors is an integer number (54034360965).

Almost surely, 2^216132508577 is an apocalyptic number.

It is an amenable number.

216132508577 is a deficient number, since it is larger than the sum of its proper divisors (4935283).

216132508577 is an equidigital number, since it uses as much as digits as its factorization.

216132508577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4935282.

The product of its (nonzero) digits is 705600, while the sum is 47.

The spelling of 216132508577 in words is "two hundred sixteen billion, one hundred thirty-two million, five hundred eight thousand, five hundred seventy-seven".