978056403677 has 8 divisors (see below), whose sum is σ = 998556546816. Its totient is φ = 957632047632.

The previous prime is 978056403619. The next prime is 978056403689. The reversal of 978056403677 is 776304650879.

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 978056403677 - 2¹² = 978056399581 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (978056400677) 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, 18920693 + ... + 18972314.

It is an arithmetic number, because the mean of its divisors is an integer number (124819568352).

Almost surely, 2^978056403677 is an apocalyptic number.

It is an amenable number.

978056403677 is a deficient number, since it is larger than the sum of its proper divisors (20500143139).

978056403677 is a wasteful number, since it uses less digits than its factorization.

978056403677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37893547.

The product of its (nonzero) digits is 53343360, while the sum is 62.

The spelling of 978056403677 in words is "nine hundred seventy-eight billion, fifty-six million, four hundred three thousand, six hundred seventy-seven".