15397532489 has 2 divisors, whose sum is σ = 15397532490. Its totient is φ = 15397532488.

The previous prime is 15397532483. The next prime is 15397532509. The reversal of 15397532489 is 98423579351.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7993790464 + 7403742025 = 89408^2 + 86045^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15397532489 is a prime.

It is not a weakly prime, because it can be changed into another prime (15397532483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7698766244 + 7698766245.

It is an arithmetic number, because the mean of its divisors is an integer number (7698766245).

Almost surely, 2^15397532489 is an apocalyptic number.

It is an amenable number.

15397532489 is a deficient number, since it is larger than the sum of its proper divisors (1).

15397532489 is an equidigital number, since it uses as much as digits as its factorization.

15397532489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8164800, while the sum is 56.

The spelling of 15397532489 in words is "fifteen billion, three hundred ninety-seven million, five hundred thirty-two thousand, four hundred eighty-nine".