155550343515 has 64 divisors (see below), whose sum is σ = 299485347840. Its totient is φ = 67348126080.

The previous prime is 155550343493. The next prime is 155550343517. The reversal of 155550343515 is 515343055551.

155550343515 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 155550343515 - 2¹¹ = 155550341467 is a prime.

It is not an unprimeable number, because it can be changed into a prime (155550343517) 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 63 ways as a sum of consecutive naturals, for example, 9709642 + ... + 9725648.

It is an arithmetic number, because the mean of its divisors is an integer number (4679458560).

Almost surely, 2^155550343515 is an apocalyptic number.

155550343515 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

155550343515 is a deficient number, since it is larger than the sum of its proper divisors (143935004325).

155550343515 is a wasteful number, since it uses less digits than its factorization.

155550343515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20912.

The product of its (nonzero) digits is 562500, while the sum is 42.

The spelling of 155550343515 in words is "one hundred fifty-five billion, five hundred fifty million, three hundred forty-three thousand, five hundred fifteen".