31636142980 has 24 divisors (see below), whose sum is σ = 71546354712. Its totient is φ = 11681037312.

The previous prime is 31636142969. The next prime is 31636143001. The reversal of 31636142980 is 8924163613.

It can be written as a sum of positive squares in 4 ways, for example, as 292273216 + 31343869764 = 17096^2 + 177042^2 .

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 in 7 ways as a sum of consecutive naturals, for example, 60838477 + ... + 60838996.

It is an arithmetic number, because the mean of its divisors is an integer number (2981098113).

Almost surely, 2^31636142980 is an apocalyptic number.

It is an amenable number.

31636142980 is an abundant number, since it is smaller than the sum of its proper divisors (39910211732).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31636142980 is a wasteful number, since it uses less digits than its factorization.

31636142980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121677495 (or 121677493 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 43.

The spelling of 31636142980 in words is "thirty-one billion, six hundred thirty-six million, one hundred forty-two thousand, nine hundred eighty".