15715717212006 has 144 divisors (see below), whose sum is σ = 40753645345296. Its totient is φ = 4360999450752.

The previous prime is 15715717211993. The next prime is 15715717212007. The reversal of 15715717212006 is 60021271751751.

15715717212006 is a `hidden beast` number, since 1 + 5 + 7 + 1 + 571 + 72 + 1 + 2 + 0 + 0 + 6 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15715717212007) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 17744845 + ... + 18609431.

It is an arithmetic number, because the mean of its divisors is an integer number (283011426009).

Almost surely, 2^{15715717212006} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15715717212006, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20376822672648).

15715717212006 is an abundant number, since it is smaller than the sum of its proper divisors (25037928133290).

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

15715717212006 is a wasteful number, since it uses less digits than its factorization.

15715717212006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 865203 (or 865193 counting only the distinct ones).

The product of its (nonzero) digits is 205800, while the sum is 45.

Adding to 15715717212006 its reverse (60021271751751), we get a palindrome (75736988963757).

The spelling of 15715717212006 in words is "fifteen trillion, seven hundred fifteen billion, seven hundred seventeen million, two hundred twelve thousand, six".