216774392471663 has 32 divisors (see below), whose sum is σ = 248032648704960. Its totient is φ = 187973064115200.

The previous prime is 216774392471653. The next prime is 216774392471671. The reversal of 216774392471663 is 366174293477612.

216774392471663 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 216774392471663 - 2¹⁰ = 216774392470639 is a prime.

It is a super-2 number, since 2×216774392471663² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 216774392471593 and 216774392471602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216774392471653) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 616383956 + ... + 616735542.

It is an arithmetic number, because the mean of its divisors is an integer number (7751020272030).

Almost surely, 2^{216774392471663} is an apocalyptic number.

216774392471663 is a deficient number, since it is larger than the sum of its proper divisors (31258256233297).

216774392471663 is a wasteful number, since it uses less digits than its factorization.

216774392471663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395867.

The product of its digits is 384072192, while the sum is 68.

The spelling of 216774392471663 in words is "two hundred sixteen trillion, seven hundred seventy-four billion, three hundred ninety-two million, four hundred seventy-one thousand, six hundred sixty-three".