1676145644849 has 4 divisors (see below), whose sum is σ = 1805079925236. Its totient is φ = 1547211364464.

The previous prime is 1676145644839. The next prime is 1676145644851. The reversal of 1676145644849 is 9484465416761.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 590850494224 + 1085295150625 = 768668^2 + 1041775^2 .

It is a cyclic number.

It is not a de Polignac number, because 1676145644849 - 2²⁸ = 1675877209393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1676145644839) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64467140174 + ... + 64467140199.

It is an arithmetic number, because the mean of its divisors is an integer number (451269981309).

Almost surely, 2^{1676145644849} is an apocalyptic number.

It is an amenable number.

1676145644849 is a deficient number, since it is larger than the sum of its proper divisors (128934280387).

1676145644849 is a wasteful number, since it uses less digits than its factorization.

1676145644849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128934280386.

The product of its digits is 139345920, while the sum is 65.

The spelling of 1676145644849 in words is "one trillion, six hundred seventy-six billion, one hundred forty-five million, six hundred forty-four thousand, eight hundred forty-nine".