997531961612 has 12 divisors (see below), whose sum is σ = 1745688234696. Its totient is φ = 498763894560.

The previous prime is 997531961603. The next prime is 997531961623. The reversal of 997531961612 is 216169135799.

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, 1148312 + ... + 1820352.

It is an arithmetic number, because the mean of its divisors is an integer number (145474019558).

Almost surely, 2^997531961612 is an apocalyptic number.

It is an amenable number.

997531961612 is a deficient number, since it is larger than the sum of its proper divisors (748156273084).

997531961612 is a wasteful number, since it uses less digits than its factorization.

997531961612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1043128 (or 1043126 counting only the distinct ones).

The product of its digits is 5511240, while the sum is 59.

The spelling of 997531961612 in words is "nine hundred ninety-seven billion, five hundred thirty-one million, nine hundred sixty-one thousand, six hundred twelve".