216657050651 has 4 divisors (see below), whose sum is σ = 217756832832. Its totient is φ = 215557268472.

The previous prime is 216657050639. The next prime is 216657050653. The reversal of 216657050651 is 156050756612.

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

It is a cyclic number.

It is not a de Polignac number, because 216657050651 - 2³⁰ = 215583308827 is a prime.

It is a super-3 number, since 3×216657050651³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216657050653) 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, 549890795 + ... + 549891188.

It is an arithmetic number, because the mean of its divisors is an integer number (54439208208).

Almost surely, 2^216657050651 is an apocalyptic number.

216657050651 is a deficient number, since it is larger than the sum of its proper divisors (1099782181).

216657050651 is a wasteful number, since it uses less digits than its factorization.

216657050651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1099782180.

The product of its (nonzero) digits is 378000, while the sum is 44.

The spelling of 216657050651 in words is "two hundred sixteen billion, six hundred fifty-seven million, fifty thousand, six hundred fifty-one".