1215787670806 has 16 divisors (see below), whose sum is σ = 1873000157616. Its totient is φ = 591454810656.

The previous prime is 1215787670789. The next prime is 1215787670807. The reversal of 1215787670806 is 6080767875121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1215787670807) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7500145 + ... + 7660531.

It is an arithmetic number, because the mean of its divisors is an integer number (117062509851).

Almost surely, 2^{1215787670806} is an apocalyptic number.

1215787670806 is a deficient number, since it is larger than the sum of its proper divisors (657212486810).

1215787670806 is a wasteful number, since it uses less digits than its factorization.

1215787670806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262863.

The product of its (nonzero) digits is 7902720, while the sum is 58.

The spelling of 1215787670806 in words is "one trillion, two hundred fifteen billion, seven hundred eighty-seven million, six hundred seventy thousand, eight hundred six".