155663424 has 224 divisors, whose sum is σ = 554492160. Its totient is φ = 41803776.

The previous prime is 155663419. The next prime is 155663513. The reversal of 155663424 is 424366551.

155663424 is a `hidden beast` number, since 1 + 556 + 63 + 42 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (224).

It is a super-2 number, since 2×155663424² = 48462203142807552, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 205254 + ... + 206010.

Almost surely, 2^155663424 is an apocalyptic number.

155663424 is a gapful number since it is divisible by the number (14) 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 155663424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (277246080).

155663424 is an abundant number, since it is smaller than the sum of its proper divisors (398828736).

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

155663424 is a wasteful number, since it uses less digits than its factorization.

155663424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 802 (or 786 counting only the distinct ones).

The product of its digits is 86400, while the sum is 36.

The square root of 155663424 is about 12476.5148979994. The cubic root of 155663424 is about 537.9338328359.

It can be divided in two parts, 1556 and 63424, that added together give a triangular number (64980 = T₃₆₀).

The spelling of 155663424 in words is "one hundred fifty-five million, six hundred sixty-three thousand, four hundred twenty-four".