155500666666500 has 48 divisors (see below), whose sum is σ = 452817941337216. Its totient is φ = 41466844444000.

The previous prime is 155500666666483. The next prime is 155500666666591. The reversal of 155500666666500 is 5666666005551.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51833554056 + ... + 51833557055.

It is an arithmetic number, because the mean of its divisors is an integer number (9433707111192).

Almost surely, 2^{155500666666500} is an apocalyptic number.

155500666666500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155500666666500 is an abundant number, since it is smaller than the sum of its proper divisors (297317274670716).

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

155500666666500 is a wasteful number, since it uses less digits than its factorization.

155500666666500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103667111133 (or 103667111121 counting only the distinct ones).

The product of its (nonzero) digits is 29160000, while the sum is 57.

The spelling of 155500666666500 in words is "one hundred fifty-five trillion, five hundred billion, six hundred sixty-six million, six hundred sixty-six thousand, five hundred".