15554120189 has 2 divisors, whose sum is σ = 15554120190. Its totient is φ = 15554120188.

The previous prime is 15554120171. The next prime is 15554120209. The reversal of 15554120189 is 98102145551.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15464912164 + 89208025 = 124358^2 + 9445^2 .

It is a cyclic number.

It is not a de Polignac number, because 15554120189 - 2¹⁶ = 15554054653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15554125189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7777060094 + 7777060095.

It is an arithmetic number, because the mean of its divisors is an integer number (7777060095).

Almost surely, 2^15554120189 is an apocalyptic number.

It is an amenable number.

15554120189 is a deficient number, since it is larger than the sum of its proper divisors (1).

15554120189 is an equidigital number, since it uses as much as digits as its factorization.

15554120189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72000, while the sum is 41.

The spelling of 15554120189 in words is "fifteen billion, five hundred fifty-four million, one hundred twenty thousand, one hundred eighty-nine".