15653359172989 has 2 divisors, whose sum is σ = 15653359172990. Its totient is φ = 15653359172988.

The previous prime is 15653359172963. The next prime is 15653359172993. The reversal of 15653359172989 is 98927195335651.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15644532570489 + 8826602500 = 3955317^2 + 93950^2 .

It is a cyclic number.

It is not a de Polignac number, because 15653359172989 - 2²⁷ = 15653224955261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15653359172929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7826679586494 + 7826679586495.

It is an arithmetic number, because the mean of its divisors is an integer number (7826679586495).

Almost surely, 2^{15653359172989} is an apocalyptic number.

It is an amenable number.

15653359172989 is a deficient number, since it is larger than the sum of its proper divisors (1).

15653359172989 is an equidigital number, since it uses as much as digits as its factorization.

15653359172989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 551124000, while the sum is 73.

The spelling of 15653359172989 in words is "fifteen trillion, six hundred fifty-three billion, three hundred fifty-nine million, one hundred seventy-two thousand, nine hundred eighty-nine".