155320335515 has 4 divisors (see below), whose sum is σ = 186384402624. Its totient is φ = 124256268408.

The previous prime is 155320335509. The next prime is 155320335523. The reversal of 155320335515 is 515533023551.

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 155320335515 - 2²⁰ = 155319286939 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15532033547 + ... + 15532033556.

It is an arithmetic number, because the mean of its divisors is an integer number (46596100656).

Almost surely, 2^155320335515 is an apocalyptic number.

155320335515 is a deficient number, since it is larger than the sum of its proper divisors (31064067109).

155320335515 is an equidigital number, since it uses as much as digits as its factorization.

155320335515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31064067108.

The product of its (nonzero) digits is 168750, while the sum is 38.

The spelling of 155320335515 in words is "one hundred fifty-five billion, three hundred twenty million, three hundred thirty-five thousand, five hundred fifteen".