978791632772 has 6 divisors (see below), whose sum is σ = 1712885357358. Its totient is φ = 489395816384.

The previous prime is 978791632757. The next prime is 978791632787. The reversal of 978791632772 is 277236197879.

It is an interprime number because it is at equal distance from previous prime (978791632757) and next prime (978791632787).

It can be written as a sum of positive squares in only one way, i.e., 925570988356 + 53220644416 = 962066^2 + 230696^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122348954093 + ... + 122348954100.

It is an arithmetic number, because the mean of its divisors is an integer number (285480892893).

Almost surely, 2^978791632772 is an apocalyptic number.

It is an amenable number.

978791632772 is a deficient number, since it is larger than the sum of its proper divisors (734093724586).

978791632772 is a wasteful number, since it uses less digits than its factorization.

978791632772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244697908197 (or 244697908195 counting only the distinct ones).

The product of its digits is 112021056, while the sum is 68.

The spelling of 978791632772 in words is "nine hundred seventy-eight billion, seven hundred ninety-one million, six hundred thirty-two thousand, seven hundred seventy-two".