2156513233066 has 64 divisors (see below), whose sum is σ = 3375293644800. Its totient is φ = 1032727014144.

The previous prime is 2156513233051. The next prime is 2156513233109. The reversal of 2156513233066 is 6603323156512.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 297980800 + ... + 297988036.

It is an arithmetic number, because the mean of its divisors is an integer number (52738963200).

Almost surely, 2^{2156513233066} is an apocalyptic number.

2156513233066 is a deficient number, since it is larger than the sum of its proper divisors (1218780411734).

2156513233066 is a wasteful number, since it uses less digits than its factorization.

2156513233066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7751.

The product of its (nonzero) digits is 583200, while the sum is 43.

Adding to 2156513233066 its reverse (6603323156512), we get a palindrome (8759836389578).

The spelling of 2156513233066 in words is "two trillion, one hundred fifty-six billion, five hundred thirteen million, two hundred thirty-three thousand, sixty-six".