1215949585240 has 96 divisors (see below), whose sum is σ = 2977569532080. Its totient is φ = 446686496256.

The previous prime is 1215949585231. The next prime is 1215949585271. The reversal of 1215949585240 is 425859495121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 875187 + ... + 1788253.

Almost surely, 2^{1215949585240} is an apocalyptic number.

1215949585240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1215949585240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1488784766040).

1215949585240 is an abundant number, since it is smaller than the sum of its proper divisors (1761619946840).

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

1215949585240 is a wasteful number, since it uses less digits than its factorization.

1215949585240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 913301 (or 913284 counting only the distinct ones).

The product of its (nonzero) digits is 5184000, while the sum is 55.

The spelling of 1215949585240 in words is "one trillion, two hundred fifteen billion, nine hundred forty-nine million, five hundred eighty-five thousand, two hundred forty".