155500132550 has 48 divisors (see below), whose sum is σ = 333956646240. Its totient is φ = 52764687360.

The previous prime is 155500132549. The next prime is 155500132607. The reversal of 155500132550 is 55231005551.

It is a congruent 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 23 ways as a sum of consecutive naturals, for example, 2256185 + ... + 2324084.

It is an arithmetic number, because the mean of its divisors is an integer number (6957430130).

Almost surely, 2^155500132550 is an apocalyptic number.

155500132550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

155500132550 is an abundant number, since it is smaller than the sum of its proper divisors (178456513690).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

155500132550 is a wasteful number, since it uses less digits than its factorization.

155500132550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4580385 (or 4580380 counting only the distinct ones).

The product of its (nonzero) digits is 18750, while the sum is 32.

The spelling of 155500132550 in words is "one hundred fifty-five billion, five hundred million, one hundred thirty-two thousand, five hundred fifty".