155953668 has 96 divisors (see below), whose sum is σ = 412917120. Its totient is φ = 45480960.

The previous prime is 155953667. The next prime is 155953703. The reversal of 155953668 is 866359551.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (155953667) 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 31 ways as a sum of consecutive naturals, for example, 236323 + ... + 236981.

It is an arithmetic number, because the mean of its divisors is an integer number (4301220).

Almost surely, 2^155953668 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 155953668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (206458560).

155953668 is an abundant number, since it is smaller than the sum of its proper divisors (256963452).

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

155953668 is a wasteful number, since it uses less digits than its factorization.

155953668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 757 (or 755 counting only the distinct ones).

The product of its digits is 972000, while the sum is 48.

The square root of 155953668 is about 12488.1410946546. The cubic root of 155953668 is about 538.2679621269.

The spelling of 155953668 in words is "one hundred fifty-five million, nine hundred fifty-three thousand, six hundred sixty-eight".