1617167988389 has 2 divisors, whose sum is σ = 1617167988390. Its totient is φ = 1617167988388.

The previous prime is 1617167988329. The next prime is 1617167988409. The reversal of 1617167988389 is 9838897617161.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1613878048225 + 3289940164 = 1270385^2 + 57358^2 .

It is a cyclic number.

It is not a de Polignac number, because 1617167988389 - 2³² = 1612873021093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1617167988329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 808583994194 + 808583994195.

It is an arithmetic number, because the mean of its divisors is an integer number (808583994195).

Almost surely, 2^{1617167988389} is an apocalyptic number.

It is an amenable number.

1617167988389 is a deficient number, since it is larger than the sum of its proper divisors (1).

1617167988389 is an equidigital number, since it uses as much as digits as its factorization.

1617167988389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 219469824, while the sum is 74.

The spelling of 1617167988389 in words is "one trillion, six hundred seventeen billion, one hundred sixty-seven million, nine hundred eighty-eight thousand, three hundred eighty-nine".