155506806 has 96 divisors (see below), whose sum is σ = 418279680. Its totient is φ = 40658112.

The previous prime is 155506783. The next prime is 155506807. The reversal of 155506806 is 608605551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155506807) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 227341 + ... + 228023.

It is an arithmetic number, because the mean of its divisors is an integer number (4357080).

Almost surely, 2^155506806 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155506806, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (209139840).

155506806 is an abundant number, since it is smaller than the sum of its proper divisors (262772874).

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

155506806 is a wasteful number, since it uses less digits than its factorization.

155506806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 850 (or 847 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 36.

The square root of 155506806 is about 12470.2368060915. The cubic root of 155506806 is about 537.7533614268.

The spelling of 155506806 in words is "one hundred fifty-five million, five hundred six thousand, eight hundred six".