1215172570512 has 20 divisors (see below), whose sum is σ = 3139195807280. Its totient is φ = 405057523488.

The previous prime is 1215172570477. The next prime is 1215172570537. The reversal of 1215172570512 is 2150752715121.

It is a super-2 number, since 2×1215172570512² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12658047562 + ... + 12658047657.

It is an arithmetic number, because the mean of its divisors is an integer number (156959790364).

Almost surely, 2^{1215172570512} is an apocalyptic number.

1215172570512 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1215172570512 is an abundant number, since it is smaller than the sum of its proper divisors (1924023236768).

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

1215172570512 is a wasteful number, since it uses less digits than its factorization.

1215172570512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25316095230 (or 25316095224 counting only the distinct ones).

The product of its (nonzero) digits is 49000, while the sum is 39.

The spelling of 1215172570512 in words is "one trillion, two hundred fifteen billion, one hundred seventy-two million, five hundred seventy thousand, five hundred twelve".