977873378779 has 8 divisors (see below), whose sum is σ = 1066779194688. Its totient is φ = 888968935560.

The previous prime is 977873378723. The next prime is 977873378789.

977873378779 is nontrivially palindromic in base 10.

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 977873378779 - 2²¹ = 977871281627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (977873378789) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1649404 + ... + 2162470.

It is an arithmetic number, because the mean of its divisors is an integer number (133347399336).

Almost surely, 2^977873378779 is an apocalyptic number.

977873378779 is a deficient number, since it is larger than the sum of its proper divisors (88905815909).

977873378779 is a wasteful number, since it uses less digits than its factorization.

977873378779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 686345.

The product of its digits is 5489031744, while the sum is 82.

The spelling of 977873378779 in words is "nine hundred seventy-seven billion, eight hundred seventy-three million, three hundred seventy-eight thousand, seven hundred seventy-nine".