1216546453 has 4 divisors (see below), whose sum is σ = 1222312288. Its totient is φ = 1210780620.

The previous prime is 1216546427. The next prime is 1216546483. The reversal of 1216546453 is 3546456121.

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 not a de Polignac number, because 1216546453 - 2²⁹ = 679675541 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 (1216546483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2882601 + ... + 2883022.

It is an arithmetic number, because the mean of its divisors is an integer number (305578072).

Almost surely, 2^1216546453 is an apocalyptic number.

It is an amenable number.

1216546453 is a deficient number, since it is larger than the sum of its proper divisors (5765835).

1216546453 is an equidigital number, since it uses as much as digits as its factorization.

1216546453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5765834.

The product of its digits is 86400, while the sum is 37.

The square root of 1216546453 is about 34879.0259755057. The cubic root of 1216546453 is about 1067.5205210804.

The spelling of 1216546453 in words is "one billion, two hundred sixteen million, five hundred forty-six thousand, four hundred fifty-three".