1215646266516 has 48 divisors (see below), whose sum is σ = 3098105250240. Its totient is φ = 367933259520.

The previous prime is 1215646266491. The next prime is 1215646266551. The reversal of 1215646266516 is 6156626465121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5445121 + ... + 5663976.

It is an arithmetic number, because the mean of its divisors is an integer number (64543859380).

Almost surely, 2^{1215646266516} is an apocalyptic number.

It is an amenable number.

1215646266516 is an abundant number, since it is smaller than the sum of its proper divisors (1882458983724).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1215646266516 is a wasteful number, since it uses less digits than its factorization.

1215646266516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11109944 (or 11109942 counting only the distinct ones).

The product of its digits is 3110400, while the sum is 51.

The spelling of 1215646266516 in words is "one trillion, two hundred fifteen billion, six hundred forty-six million, two hundred sixty-six thousand, five hundred sixteen".