997435669076 has 96 divisors (see below), whose sum is σ = 2182845369600. Its totient is φ = 387430548480.

The previous prime is 997435669063. The next prime is 997435669079. The reversal of 997435669076 is 670966534799.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997435669079) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 173857280 + ... + 173863016.

It is an arithmetic number, because the mean of its divisors is an integer number (22737972600).

Almost surely, 2^997435669076 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 997435669076, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1091422684800).

997435669076 is an abundant number, since it is smaller than the sum of its proper divisors (1185409700524).

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

997435669076 is a wasteful number, since it uses less digits than its factorization.

With its successor (997435669077) it forms a Ruth-Aaron pair, since the sum of their distinct prime factors is the same (7375).

With its successor (997435669077) it forms an eRAP, since the sums of their prime factors are consecutive (7377 and 7378).

997435669076 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7377 (or 7375 counting only the distinct ones).

The product of its (nonzero) digits is 462944160, while the sum is 71.

The spelling of 997435669076 in words is "nine hundred ninety-seven billion, four hundred thirty-five million, six hundred sixty-nine thousand, seventy-six".