997481702512 has 40 divisors (see below), whose sum is σ = 1943546140800. Its totient is φ = 495924317952.

The previous prime is 997481702491. The next prime is 997481702543. The reversal of 997481702512 is 215207184799.

It is a super-2 number, since 2×997481702512² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

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, 5454414 + ... + 5634322.

It is an arithmetic number, because the mean of its divisors is an integer number (48588653520).

Almost surely, 2^997481702512 is an apocalyptic number.

It is an amenable number.

997481702512 is a deficient number, since it is larger than the sum of its proper divisors (946064438288).

997481702512 is a wasteful number, since it uses less digits than its factorization.

997481702512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181873 (or 181867 counting only the distinct ones).

The product of its (nonzero) digits is 2540160, while the sum is 55.

The spelling of 997481702512 in words is "nine hundred ninety-seven billion, four hundred eighty-one million, seven hundred two thousand, five hundred twelve".