1676816680545 has 24 divisors (see below), whose sum is σ = 2949862583616. Its totient is φ = 880954433568.

The previous prime is 1676816680543. The next prime is 1676816680549. The reversal of 1676816680545 is 5450866186761.

1676816680545 is a `hidden beast` number, since 1 + 6 + 7 + 6 + 8 + 1 + 6 + 6 + 80 + 545 = 666.

It is not a de Polignac number, because 1676816680545 - 2¹ = 1676816680543 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1676816680543) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 278076037 + ... + 278082066.

It is an arithmetic number, because the mean of its divisors is an integer number (122910940984).

Almost surely, 2^{1676816680545} is an apocalyptic number.

1676816680545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1676816680545 is a deficient number, since it is larger than the sum of its proper divisors (1273045903071).

1676816680545 is a wasteful number, since it uses less digits than its factorization.

1676816680545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 556158181 (or 556158178 counting only the distinct ones).

The product of its (nonzero) digits is 58060800, while the sum is 63.

The spelling of 1676816680545 in words is "one trillion, six hundred seventy-six billion, eight hundred sixteen million, six hundred eighty thousand, five hundred forty-five".