977681608826 has 16 divisors (see below), whose sum is σ = 1612934636544. Its totient is φ = 441636863664.

The previous prime is 977681608789. The next prime is 977681608837. The reversal of 977681608826 is 628806186779.

It is a super-2 number, since 2×977681608826² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 400032170 + ... + 400034613.

It is an arithmetic number, because the mean of its divisors is an integer number (100808414784).

Almost surely, 2^977681608826 is an apocalyptic number.

977681608826 is a deficient number, since it is larger than the sum of its proper divisors (635253027718).

977681608826 is a wasteful number, since it uses less digits than its factorization.

977681608826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 800066845.

The product of its (nonzero) digits is 97542144, while the sum is 68.

The spelling of 977681608826 in words is "nine hundred seventy-seven billion, six hundred eighty-one million, six hundred eight thousand, eight hundred twenty-six".