155508503623 has 4 divisors (see below), whose sum is σ = 169645640328. Its totient is φ = 141371366920.

The previous prime is 155508503621. The next prime is 155508503627. The reversal of 155508503623 is 326305805551.

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 155508503623 - 2¹ = 155508503621 is a prime.

It is a super-2 number, since 2×155508503623² (a number of 23 digits) contains 22 as substring.

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 155508503623.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155508503621) by changing a digit.

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, 7068568336 + ... + 7068568357.

It is an arithmetic number, because the mean of its divisors is an integer number (42411410082).

Almost surely, 2^155508503623 is an apocalyptic number.

155508503623 is a deficient number, since it is larger than the sum of its proper divisors (14137136705).

155508503623 is a wasteful number, since it uses less digits than its factorization.

155508503623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14137136704.

The product of its (nonzero) digits is 540000, while the sum is 43.

The spelling of 155508503623 in words is "one hundred fifty-five billion, five hundred eight million, five hundred three thousand, six hundred twenty-three".