1215229329647 has 6 divisors (see below), whose sum is σ = 1258578771528. Its totient is φ = 1173324869192.

The previous prime is 1215229329637. The next prime is 1215229329649. The reversal of 1215229329647 is 7469239225121.

It is not a de Polignac number, because 1215229329647 - 2⁴ = 1215229329631 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 (1215229329649) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 722489843 + ... + 722491524.

It is an arithmetic number, because the mean of its divisors is an integer number (209763128588).

Almost surely, 2^{1215229329647} is an apocalyptic number.

1215229329647 is a deficient number, since it is larger than the sum of its proper divisors (43349441881).

1215229329647 is an equidigital number, since it uses as much as digits as its factorization.

1215229329647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1444981425 (or 1444981396 counting only the distinct ones).

The product of its digits is 3265920, while the sum is 53.

The spelling of 1215229329647 in words is "one trillion, two hundred fifteen billion, two hundred twenty-nine million, three hundred twenty-nine thousand, six hundred forty-seven".