155616 has 24 divisors (see below), whose sum is σ = 408744. Its totient is φ = 51840.

The previous prime is 155609. The next prime is 155621. The reversal of 155616 is 616551.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 155616.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 715 + ... + 906.

It is an arithmetic number, because the mean of its divisors is an integer number (17031).

2¹⁵⁵⁶¹⁶ is an apocalyptic number.

155616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

155616 is an abundant number, since it is smaller than the sum of its proper divisors (253128).

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

155616 is a wasteful number, since it uses less digits than its factorization.

155616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1634 (or 1626 counting only the distinct ones).

The product of its digits is 900, while the sum is 24.

The square root of 155616 is about 394.4819387501. The cubic root of 155616 is about 53.7879198796.

The spelling of 155616 in words is "one hundred fifty-five thousand, six hundred sixteen".