155980027 has 4 divisors (see below), whose sum is σ = 178262896. Its totient is φ = 133697160.

The previous prime is 155979983. The next prime is 155980037. The reversal of 155980027 is 720089551.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155980027 is a prime.

It is not an unprimeable number, because it can be changed into a prime (155980037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11141424 + ... + 11141437.

It is an arithmetic number, because the mean of its divisors is an integer number (44565724).

Almost surely, 2^155980027 is an apocalyptic number.

155980027 is a deficient number, since it is larger than the sum of its proper divisors (22282869).

155980027 is an equidigital number, since it uses as much as digits as its factorization.

155980027 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22282868.

The product of its (nonzero) digits is 25200, while the sum is 37.

The square root of 155980027 is about 12489.1964112988. The cubic root of 155980027 is about 538.2982861031.

The spelling of 155980027 in words is "one hundred fifty-five million, nine hundred eighty thousand, twenty-seven".