1977680676443 has 8 divisors (see below), whose sum is σ = 2041800508416. Its totient is φ = 1913581074600.

The previous prime is 1977680676431. The next prime is 1977680676449. The reversal of 1977680676443 is 3446760867791.

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

It is a cyclic number.

It is not a de Polignac number, because 1977680676443 - 2³⁰ = 1976606934619 is a prime.

It is a super-2 number, since 2×1977680676443² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1977680676449) 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 7 ways as a sum of consecutive naturals, for example, 4858721 + ... + 5250002.

It is an arithmetic number, because the mean of its divisors is an integer number (255225063552).

Almost surely, 2^{1977680676443} is an apocalyptic number.

1977680676443 is a deficient number, since it is larger than the sum of its proper divisors (64119831973).

1977680676443 is a wasteful number, since it uses less digits than its factorization.

1977680676443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10115065.

The product of its (nonzero) digits is 256048128, while the sum is 68.

The spelling of 1977680676443 in words is "one trillion, nine hundred seventy-seven billion, six hundred eighty million, six hundred seventy-six thousand, four hundred forty-three".