155939754925813 has 8 divisors (see below), whose sum is σ = 158766203811800. Its totient is φ = 153131962468608.

The previous prime is 155939754925769. The next prime is 155939754925841. The reversal of 155939754925813 is 318529457939551.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 81100957438449 + 74838797487364 = 9005607^2 + 8650942^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 155939754925813 - 2¹⁷ = 155939754794741 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 155939754925813.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155939754925873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4664090328 + ... + 4664123761.

It is an arithmetic number, because the mean of its divisors is an integer number (19845775476475).

Almost surely, 2^{155939754925813} is an apocalyptic number.

It is an amenable number.

155939754925813 is a deficient number, since it is larger than the sum of its proper divisors (2826448885987).

155939754925813 is an equidigital number, since it uses as much as digits as its factorization.

155939754925813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9328214391.

The product of its digits is 1837080000, while the sum is 76.

The spelling of 155939754925813 in words is "one hundred fifty-five trillion, nine hundred thirty-nine billion, seven hundred fifty-four million, nine hundred twenty-five thousand, eight hundred thirteen".