215112510664 has 8 divisors (see below), whose sum is σ = 403335957510. Its totient is φ = 107556255328.

The previous prime is 215112510611. The next prime is 215112510673. The reversal of 215112510664 is 466015211512.

It can be written as a sum of positive squares in only one way, i.e., 209802473764 + 5310036900 = 458042^2 + 72870^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13444531909 + ... + 13444531924.

Almost surely, 2^215112510664 is an apocalyptic number.

It is an amenable number.

215112510664 is a deficient number, since it is larger than the sum of its proper divisors (188223446846).

215112510664 is a wasteful number, since it uses less digits than its factorization.

215112510664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26889063839 (or 26889063835 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 34.

The spelling of 215112510664 in words is "two hundred fifteen billion, one hundred twelve million, five hundred ten thousand, six hundred sixty-four".