997560132644 has 12 divisors (see below), whose sum is σ = 1837610770800. Its totient is φ = 472528483848.

The previous prime is 997560132643. The next prime is 997560132649. The reversal of 997560132644 is 446231065799.

It is a self number, because there is not a number n which added to its sum of digits gives 997560132644.

It is not an unprimeable number, because it can be changed into a prime (997560132643) 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 3 ways as a sum of consecutive naturals, for example, 6562895534 + ... + 6562895685.

It is an arithmetic number, because the mean of its divisors is an integer number (153134230900).

Almost surely, 2^997560132644 is an apocalyptic number.

It is an amenable number.

997560132644 is a deficient number, since it is larger than the sum of its proper divisors (840050638156).

997560132644 is a wasteful number, since it uses less digits than its factorization.

997560132644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13125791242 (or 13125791240 counting only the distinct ones).

The product of its (nonzero) digits is 9797760, while the sum is 56.

The spelling of 997560132644 in words is "nine hundred ninety-seven billion, five hundred sixty million, one hundred thirty-two thousand, six hundred forty-four".