155580043499 has 2 divisors, whose sum is σ = 155580043500. Its totient is φ = 155580043498.

The previous prime is 155580043469. The next prime is 155580043501. The reversal of 155580043499 is 994340085551.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155580043499 is a prime.

Together with 155580043501, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 155580043499.

It is not a weakly prime, because it can be changed into another prime (155580043429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77790021749 + 77790021750.

It is an arithmetic number, because the mean of its divisors is an integer number (77790021750).

Almost surely, 2^155580043499 is an apocalyptic number.

155580043499 is a deficient number, since it is larger than the sum of its proper divisors (1).

155580043499 is an equidigital number, since it uses as much as digits as its factorization.

155580043499 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888000, while the sum is 53.

The spelling of 155580043499 in words is "one hundred fifty-five billion, five hundred eighty million, forty-three thousand, four hundred ninety-nine".