155815091259 has 16 divisors (see below), whose sum is σ = 213028034688. Its totient is φ = 101271405312.

The previous prime is 155815091231. The next prime is 155815091261. The reversal of 155815091259 is 952190518551.

155815091259 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 155815091259 - 2¹² = 155815087163 is a prime.

It is not an unprimeable number, because it can be changed into a prime (155815090259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3976377 + ... + 4015370.

It is an arithmetic number, because the mean of its divisors is an integer number (13314252168).

Almost surely, 2^155815091259 is an apocalyptic number.

155815091259 is a deficient number, since it is larger than the sum of its proper divisors (57212943429).

155815091259 is an equidigital number, since it uses as much as digits as its factorization.

155815091259 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7991914.

The product of its (nonzero) digits is 810000, while the sum is 51.

The spelling of 155815091259 in words is "one hundred fifty-five billion, eight hundred fifteen million, ninety-one thousand, two hundred fifty-nine".