2151205528066 has 48 divisors (see below), whose sum is σ = 3793822236792. Its totient is φ = 912081945600.

The previous prime is 2151205528051. The next prime is 2151205528079. The reversal of 2151205528066 is 6608255021512.

It can be written as a sum of positive squares in 4 ways, for example, as 1870819392841 + 280386135225 = 1367779^2 + 529515^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24872056 + ... + 24958396.

Almost surely, 2^{2151205528066} is an apocalyptic number.

2151205528066 is a deficient number, since it is larger than the sum of its proper divisors (1642616708726).

2151205528066 is a wasteful number, since it uses less digits than its factorization.

2151205528066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89075 (or 89068 counting only the distinct ones).

The product of its (nonzero) digits is 288000, while the sum is 43.

The spelling of 2151205528066 in words is "two trillion, one hundred fifty-one billion, two hundred five million, five hundred twenty-eight thousand, sixty-six".