997560132649 has 2 divisors, whose sum is σ = 997560132650. Its totient is φ = 997560132648.

The previous prime is 997560132643. The next prime is 997560132659. The reversal of 997560132649 is 946231065799.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 939141242649 + 58418890000 = 969093^2 + 241700^2 .

It is a cyclic number.

It is not a de Polignac number, because 997560132649 - 2⁷ = 997560132521 is a prime.

It is not a weakly prime, because it can be changed into another prime (997560132643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498780066324 + 498780066325.

It is an arithmetic number, because the mean of its divisors is an integer number (498780066325).

Almost surely, 2^997560132649 is an apocalyptic number.

It is an amenable number.

997560132649 is a deficient number, since it is larger than the sum of its proper divisors (1).

997560132649 is an equidigital number, since it uses as much as digits as its factorization.

997560132649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22044960, while the sum is 61.

The spelling of 997560132649 in words is "nine hundred ninety-seven billion, five hundred sixty million, one hundred thirty-two thousand, six hundred forty-nine".