216412046612557 has 4 divisors (see below), whose sum is σ = 218116078475776. Its totient is φ = 214708014749340.

The previous prime is 216412046612431. The next prime is 216412046612563. The reversal of 216412046612557 is 755216640214612.

216412046612557 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-216412046612557 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 (216412046612257) 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, 852015931419 + ... + 852015931672.

It is an arithmetic number, because the mean of its divisors is an integer number (54529019618944).

Almost surely, 2^{216412046612557} is an apocalyptic number.

It is an amenable number.

216412046612557 is a deficient number, since it is larger than the sum of its proper divisors (1704031863219).

216412046612557 is a wasteful number, since it uses less digits than its factorization.

216412046612557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1704031863218.

The product of its (nonzero) digits is 4838400, while the sum is 52.

The spelling of 216412046612557 in words is "two hundred sixteen trillion, four hundred twelve billion, forty-six million, six hundred twelve thousand, five hundred fifty-seven".