155134166550 has 144 divisors (see below), whose sum is σ = 423780542976. Its totient is φ = 37528920000.

The previous prime is 155134166521. The next prime is 155134166557. The reversal of 155134166550 is 55661431551.

155134166550 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155134166557) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 8830275 + ... + 8847825.

Almost surely, 2^155134166550 is an apocalyptic number.

155134166550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 155134166550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (211890271488).

155134166550 is an abundant number, since it is smaller than the sum of its proper divisors (268646376426).

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

155134166550 is a wasteful number, since it uses less digits than its factorization.

155134166550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18075 (or 18059 counting only the distinct ones).

The product of its (nonzero) digits is 270000, while the sum is 42.

The spelling of 155134166550 in words is "one hundred fifty-five billion, one hundred thirty-four million, one hundred sixty-six thousand, five hundred fifty".