977988966782 has 16 divisors (see below), whose sum is σ = 1487177896992. Its totient is φ = 482263891200.

The previous prime is 977988966641. The next prime is 977988966847. The reversal of 977988966782 is 287669889779.

It is a junction number, because it is equal to n+sod(n) for n = 977988966694 and 977988966703.

It is a congruent 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, 2063063 + ... + 2492429.

It is an arithmetic number, because the mean of its divisors is an integer number (92948618562).

Almost surely, 2^977988966782 is an apocalyptic number.

977988966782 is a deficient number, since it is larger than the sum of its proper divisors (509188930210).

977988966782 is a wasteful number, since it uses less digits than its factorization.

977988966782 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 445043.

The product of its digits is 9217732608, while the sum is 86.

The spelling of 977988966782 in words is "nine hundred seventy-seven billion, nine hundred eighty-eight million, nine hundred sixty-six thousand, seven hundred eighty-two".