216445433454 has 12 divisors (see below), whose sum is σ = 468965105856. Its totient is φ = 72148477812.

The previous prime is 216445433443. The next prime is 216445433513. The reversal of 216445433454 is 454334544612.

216445433454 is a `hidden beast` number, since 2 + 1 + 64 + 4 + 543 + 3 + 45 + 4 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6012373134 + ... + 6012373169.

It is an arithmetic number, because the mean of its divisors is an integer number (39080425488).

Almost surely, 2^216445433454 is an apocalyptic number.

216445433454 is an abundant number, since it is smaller than the sum of its proper divisors (252519672402).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

216445433454 is a wasteful number, since it uses less digits than its factorization.

216445433454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12024746311 (or 12024746308 counting only the distinct ones).

The product of its digits is 2764800, while the sum is 45.

The spelling of 216445433454 in words is "two hundred sixteen billion, four hundred forty-five million, four hundred thirty-three thousand, four hundred fifty-four".