1216645527407 has 2 divisors, whose sum is σ = 1216645527408. Its totient is φ = 1216645527406.

The previous prime is 1216645527379. The next prime is 1216645527431. The reversal of 1216645527407 is 7047255466121.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1216645527407 - 2⁸ = 1216645527151 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1216645520407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 608322763703 + 608322763704.

It is an arithmetic number, because the mean of its divisors is an integer number (608322763704).

Almost surely, 2^{1216645527407} is an apocalyptic number.

1216645527407 is a deficient number, since it is larger than the sum of its proper divisors (1).

1216645527407 is an equidigital number, since it uses as much as digits as its factorization.

1216645527407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2822400, while the sum is 50.

The spelling of 1216645527407 in words is "one trillion, two hundred sixteen billion, six hundred forty-five million, five hundred twenty-seven thousand, four hundred seven".