971639551208 has 16 divisors (see below), whose sum is σ = 1821871770180. Its totient is φ = 485807079168.

The previous prime is 971639551177. The next prime is 971639551229. The reversal of 971639551208 is 802155936179.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 731541511204 + 240098040004 = 855302^2 + 489998^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1257791 + ... + 1877582.

Almost surely, 2^971639551208 is an apocalyptic number.

It is an amenable number.

971639551208 is a deficient number, since it is larger than the sum of its proper divisors (850232218972).

971639551208 is a wasteful number, since it uses less digits than its factorization.

971639551208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3174116 (or 3174112 counting only the distinct ones).

The product of its (nonzero) digits is 4082400, while the sum is 56.

The spelling of 971639551208 in words is "nine hundred seventy-one billion, six hundred thirty-nine million, five hundred fifty-one thousand, two hundred eight".