1215555504463 has 2 divisors, whose sum is σ = 1215555504464. Its totient is φ = 1215555504462.

The previous prime is 1215555504409. The next prime is 1215555504469. The reversal of 1215555504463 is 3644055555121.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (3644055555121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1215555504463 - 2²¹ = 1215553407311 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1215555504469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 607777752231 + 607777752232.

It is an arithmetic number, because the mean of its divisors is an integer number (607777752232).

Almost surely, 2^{1215555504463} is an apocalyptic number.

1215555504463 is a deficient number, since it is larger than the sum of its proper divisors (1).

1215555504463 is an equidigital number, since it uses as much as digits as its factorization.

1215555504463 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1800000, while the sum is 46.

The spelling of 1215555504463 in words is "one trillion, two hundred fifteen billion, five hundred fifty-five million, five hundred four thousand, four hundred sixty-three".