1215170884864 has 36 divisors (see below), whose sum is σ = 2425838871456. Its totient is φ = 607524357632.

The previous prime is 1215170884861. The next prime is 1215170884883. The reversal of 1215170884864 is 4684880715121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1215170884861) 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, 2368197 + ... + 2835259.

It is an arithmetic number, because the mean of its divisors is an integer number (67384413096).

Almost surely, 2^{1215170884864} is an apocalyptic number.

It is an amenable number.

1215170884864 is a deficient number, since it is larger than the sum of its proper divisors (1210667986592).

1215170884864 is an equidigital number, since it uses as much as digits as its factorization.

1215170884864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 477242 (or 477228 counting only the distinct ones).

The product of its (nonzero) digits is 3440640, while the sum is 55.

The spelling of 1215170884864 in words is "one trillion, two hundred fifteen billion, one hundred seventy million, eight hundred eighty-four thousand, eight hundred sixty-four".