2145660005546 has 8 divisors (see below), whose sum is σ = 3246972221124. Its totient is φ = 1063335931840.

The previous prime is 2145660005543. The next prime is 2145660005551. The reversal of 2145660005546 is 6455000665412.

It can be written as a sum of positive squares in 2 ways, for example, as 1620882913321 + 524777092225 = 1273139^2 + 724415^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 2145660005497 and 2145660005506.

It is not an unprimeable number, because it can be changed into a prime (2145660005543) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 4747035185 + ... + 4747035636.

Almost surely, 2^{2145660005546} is an apocalyptic number.

2145660005546 is a deficient number, since it is larger than the sum of its proper divisors (1101312215578).

2145660005546 is a wasteful number, since it uses less digits than its factorization.

2145660005546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9494070936.

The product of its (nonzero) digits is 864000, while the sum is 44.

The spelling of 2145660005546 in words is "two trillion, one hundred forty-five billion, six hundred sixty million, five thousand, five hundred forty-six".