997662131946 has 48 divisors (see below), whose sum is σ = 2184282172800. Its totient is φ = 329065922304.

The previous prime is 997662131941. The next prime is 997662131957. The reversal of 997662131946 is 649131266799.

It is not an unprimeable number, because it can be changed into a prime (997662131941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10145965 + ... + 10243823.

It is an arithmetic number, because the mean of its divisors is an integer number (45505878600).

Almost surely, 2^997662131946 is an apocalyptic number.

997662131946 is an abundant number, since it is smaller than the sum of its proper divisors (1186620040854).

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

997662131946 is a wasteful number, since it uses less digits than its factorization.

997662131946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103803 (or 103800 counting only the distinct ones).

The product of its digits is 26453952, while the sum is 63.

The spelling of 997662131946 in words is "nine hundred ninety-seven billion, six hundred sixty-two million, one hundred thirty-one thousand, nine hundred forty-six".