1215364928839 has 4 divisors (see below), whose sum is σ = 1215389125656. Its totient is φ = 1215340732024.

The previous prime is 1215364928747. The next prime is 1215364928893. The reversal of 1215364928839 is 9388294635121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1215364928839 - 2²³ = 1215356540231 is a prime.

It is a super-2 number, since 2×1215364928839² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1215364928539) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12022909 + ... + 12123574.

It is an arithmetic number, because the mean of its divisors is an integer number (303847281414).

Almost surely, 2^{1215364928839} is an apocalyptic number.

1215364928839 is a deficient number, since it is larger than the sum of its proper divisors (24196817).

1215364928839 is an equidigital number, since it uses as much as digits as its factorization.

1215364928839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24196816.

The product of its digits is 22394880, while the sum is 61.

The spelling of 1215364928839 in words is "one trillion, two hundred fifteen billion, three hundred sixty-four million, nine hundred twenty-eight thousand, eight hundred thirty-nine".