188157835549 has 2 divisors, whose sum is σ = 188157835550. Its totient is φ = 188157835548.

The previous prime is 188157835543. The next prime is 188157835637. The reversal of 188157835549 is 945538751881.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 169937695225 + 18220140324 = 412235^2 + 134982^2 .

It is an emirp because it is prime and its reverse (945538751881) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-188157835549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (188157835543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94078917774 + 94078917775.

It is an arithmetic number, because the mean of its divisors is an integer number (94078917775).

Almost surely, 2^188157835549 is an apocalyptic number.

It is an amenable number.

188157835549 is a deficient number, since it is larger than the sum of its proper divisors (1).

188157835549 is an equidigital number, since it uses as much as digits as its factorization.

188157835549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48384000, while the sum is 64.

The spelling of 188157835549 in words is "one hundred eighty-eight billion, one hundred fifty-seven million, eight hundred thirty-five thousand, five hundred forty-nine".