155219668199 has 16 divisors (see below), whose sum is σ = 164605373280. Its totient is φ = 145957593600.

The previous prime is 155219668193. The next prime is 155219668207. The reversal of 155219668199 is 991866912551.

It is a cyclic number.

It is not a de Polignac number, because 155219668199 - 2⁴ = 155219668183 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155219668193) 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 in 15 ways as a sum of consecutive naturals, for example, 2815499 + ... + 2870099.

It is an arithmetic number, because the mean of its divisors is an integer number (10287835830).

Almost surely, 2^155219668199 is an apocalyptic number.

155219668199 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

155219668199 is a deficient number, since it is larger than the sum of its proper divisors (9385705081).

155219668199 is a wasteful number, since it uses less digits than its factorization.

155219668199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55730.

The product of its digits is 10497600, while the sum is 62.

The spelling of 155219668199 in words is "one hundred fifty-five billion, two hundred nineteen million, six hundred sixty-eight thousand, one hundred ninety-nine".