87215447747412 has 144 divisors (see below), whose sum is σ = 237737852352000. Its totient is φ = 26869890535488.

The previous prime is 87215447747387. The next prime is 87215447747423. The reversal of 87215447747412 is 21474774451278.

87215447747412 is a `hidden beast` number, since 8 + 7 + 2 + 1 + 544 + 7 + 7 + 4 + 74 + 12 = 666.

87215447747412 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 87215447747412.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 23538889 + ... + 26990927.

It is an arithmetic number, because the mean of its divisors is an integer number (1650957308000).

Almost surely, 2^{87215447747412} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 87215447747412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (118868926176000).

87215447747412 is an abundant number, since it is smaller than the sum of its proper divisors (150522404604588).

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

87215447747412 is a wasteful number, since it uses less digits than its factorization.

87215447747412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3452970 (or 3452965 counting only the distinct ones).

The product of its digits is 98344960, while the sum is 63.

The spelling of 87215447747412 in words is "eighty-seven trillion, two hundred fifteen billion, four hundred forty-seven million, seven hundred forty-seven thousand, four hundred twelve".