155500665000 has 160 divisors (see below), whose sum is σ = 486350568000. Its totient is φ = 41418496000.

The previous prime is 155500664999. The next prime is 155500665029. The reversal of 155500665000 is 566005551.

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 39 ways as a sum of consecutive naturals, for example, 13929421 + ... + 13940579.

It is an arithmetic number, because the mean of its divisors is an integer number (3039691050).

Almost surely, 2^155500665000 is an apocalyptic number.

155500665000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155500665000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (243175284000).

155500665000 is an abundant number, since it is smaller than the sum of its proper divisors (330849903000).

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

155500665000 is a wasteful number, since it uses less digits than its factorization.

155500665000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12117 (or 12098 counting only the distinct ones).

The product of its (nonzero) digits is 22500, while the sum is 33.

The spelling of 155500665000 in words is "one hundred fifty-five billion, five hundred million, six hundred sixty-five thousand".