215151006664 has 64 divisors (see below), whose sum is σ = 452116776960. Its totient is φ = 95123082240.

The previous prime is 215151006659. The next prime is 215151006683. The reversal of 215151006664 is 466600151512.

It is a Harshad number since it is a multiple of its sum of digits (37).

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 15 ways as a sum of consecutive naturals, for example, 12908224 + ... + 12924880.

It is an arithmetic number, because the mean of its divisors is an integer number (7064324640).

Almost surely, 2^215151006664 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 215151006664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (226058388480).

215151006664 is an abundant number, since it is smaller than the sum of its proper divisors (236965770296).

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

215151006664 is a wasteful number, since it uses less digits than its factorization.

215151006664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20678 (or 20674 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 37.

The spelling of 215151006664 in words is "two hundred fifteen billion, one hundred fifty-one million, six thousand, six hundred sixty-four".