155015616 has 84 divisors (see below), whose sum is σ = 477136968. Its totient is φ = 44287488.

The previous prime is 155015587. The next prime is 155015647. The reversal of 155015616 is 616510551.

It is a tau number, because it is divible by the number of its divisors (84).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1170 + ... + 17646.

It is an arithmetic number, because the mean of its divisors is an integer number (5680202).

Almost surely, 2^155015616 is an apocalyptic number.

155015616 is a gapful number since it is divisible by the number (16) 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 155015616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (238568484).

155015616 is an abundant number, since it is smaller than the sum of its proper divisors (322121352).

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

155015616 is a wasteful number, since it uses less digits than its factorization.

155015616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16506 (or 16489 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 30.

The square root of 155015616 is about 12450.5267358454. The cubic root of 155015616 is about 537.1865745099.

The spelling of 155015616 in words is "one hundred fifty-five million, fifteen thousand, six hundred sixteen".