155306605983 has 4 divisors (see below), whose sum is σ = 207075474648. Its totient is φ = 103537737320.

The previous prime is 155306605973. The next prime is 155306606009. The reversal of 155306605983 is 389506603551.

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

It is a cyclic number.

It is not a de Polignac number, because 155306605983 - 2¹⁶ = 155306540447 is a prime.

It is a super-2 number, since 2×155306605983² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155306605933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25884434328 + ... + 25884434333.

It is an arithmetic number, because the mean of its divisors is an integer number (51768868662).

Almost surely, 2^155306605983 is an apocalyptic number.

155306605983 is a deficient number, since it is larger than the sum of its proper divisors (51768868665).

155306605983 is an equidigital number, since it uses as much as digits as its factorization.

155306605983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51768868664.

The product of its (nonzero) digits is 2916000, while the sum is 51.

The spelling of 155306605983 in words is "one hundred fifty-five billion, three hundred six million, six hundred five thousand, nine hundred eighty-three".