1215647374099 has 2 divisors, whose sum is σ = 1215647374100. Its totient is φ = 1215647374098.

The previous prime is 1215647374069. The next prime is 1215647374121. The reversal of 1215647374099 is 9904737465121.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1215647374099 is a prime.

It is not a weakly prime, because it can be changed into another prime (1215647374069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 607823687049 + 607823687050.

It is an arithmetic number, because the mean of its divisors is an integer number (607823687050).

Almost surely, 2^{1215647374099} is an apocalyptic number.

1215647374099 is a deficient number, since it is larger than the sum of its proper divisors (1).

1215647374099 is an equidigital number, since it uses as much as digits as its factorization.

1215647374099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11430720, while the sum is 58.

The spelling of 1215647374099 in words is "one trillion, two hundred fifteen billion, six hundred forty-seven million, three hundred seventy-four thousand, ninety-nine".