155515104 has 72 divisors (see below), whose sum is σ = 451694880. Its totient is φ = 50731008.

The previous prime is 155515103. The next prime is 155515141. The reversal of 155515104 is 401515551.

155515104 is a `hidden beast` number, since 1 + 5 + 551 + 5 + 104 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155515103) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7792 + ... + 19280.

It is an arithmetic number, because the mean of its divisors is an integer number (6273540).

Almost surely, 2^155515104 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155515104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (225847440).

155515104 is an abundant number, since it is smaller than the sum of its proper divisors (296179776).

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

155515104 is a wasteful number, since it uses less digits than its factorization.

155515104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11552 (or 11541 counting only the distinct ones).

The product of its (nonzero) digits is 2500, while the sum is 27.

The square root of 155515104 is about 12470.5695138594. The cubic root of 155515104 is about 537.7629262772.

The spelling of 155515104 in words is "one hundred fifty-five million, five hundred fifteen thousand, one hundred four".