216611330551 has 48 divisors (see below), whose sum is σ = 287874915840. Its totient is φ = 160864038720.

The previous prime is 216611330543. The next prime is 216611330557. The reversal of 216611330551 is 155033116612.

It is not a de Polignac number, because 216611330551 - 2³ = 216611330543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216611330557) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3402430 + ... + 3465508.

It is an arithmetic number, because the mean of its divisors is an integer number (5997394080).

Almost surely, 2^216611330551 is an apocalyptic number.

216611330551 is a deficient number, since it is larger than the sum of its proper divisors (71263585289).

216611330551 is a wasteful number, since it uses less digits than its factorization.

216611330551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63404 (or 63397 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 34.

The spelling of 216611330551 in words is "two hundred sixteen billion, six hundred eleven million, three hundred thirty thousand, five hundred fifty-one".