155620116 has 72 divisors (see below), whose sum is σ = 425740224. Its totient is φ = 49610880.

The previous prime is 155620109. The next prime is 155620117. The reversal of 155620116 is 611026551.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 155620116.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155620117) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 18876 + ... + 25836.

Almost surely, 2^155620116 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 155620116, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (212870112).

155620116 is an abundant number, since it is smaller than the sum of its proper divisors (270120108).

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

155620116 is a wasteful number, since it uses less digits than its factorization.

155620116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7003 (or 6989 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

The square root of 155620116 is about 12474.7791964427. The cubic root of 155620116 is about 537.8839410058.

Adding to 155620116 its reverse (611026551), we get a palindrome (766646667).

The spelling of 155620116 in words is "one hundred fifty-five million, six hundred twenty thousand, one hundred sixteen".