1215646266513 has 32 divisors (see below), whose sum is σ = 1855015059456. Its totient is φ = 693680082048.

The previous prime is 1215646266491. The next prime is 1215646266551. The reversal of 1215646266513 is 3156626465121.

It is a happy number.

It is not a de Polignac number, because 1215646266513 - 2¹² = 1215646262417 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1215646266553) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 45631045 + ... + 45657677.

It is an arithmetic number, because the mean of its divisors is an integer number (57969220608).

Almost surely, 2^{1215646266513} is an apocalyptic number.

It is an amenable number.

1215646266513 is a deficient number, since it is larger than the sum of its proper divisors (639368792943).

1215646266513 is a wasteful number, since it uses less digits than its factorization.

1215646266513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29613.

The product of its digits is 1555200, while the sum is 48.

The spelling of 1215646266513 in words is "one trillion, two hundred fifteen billion, six hundred forty-six million, two hundred sixty-six thousand, five hundred thirteen".