2157466666385 has 16 divisors (see below), whose sum is σ = 2743816194000. Its totient is φ = 1622925828096.

The previous prime is 2157466666343. The next prime is 2157466666387. The reversal of 2157466666385 is 5836666647512.

It can be written as a sum of positive squares in 8 ways, for example, as 341419344721 + 1816047321664 = 584311^2 + 1347608^2 .

It is a cyclic number.

It is not a de Polignac number, because 2157466666385 - 2¹⁸ = 2157466404241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2157466666387) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 11780960 + ... + 11962689.

It is an arithmetic number, because the mean of its divisors is an integer number (171488512125).

Almost surely, 2^{2157466666385} is an apocalyptic number.

It is an amenable number.

2157466666385 is a deficient number, since it is larger than the sum of its proper divisors (586349527615).

2157466666385 is a wasteful number, since it uses less digits than its factorization.

2157466666385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23744740.

The product of its digits is 261273600, while the sum is 65.

The spelling of 2157466666385 in words is "two trillion, one hundred fifty-seven billion, four hundred sixty-six million, six hundred sixty-six thousand, three hundred eighty-five".