155668422 has 128 divisors (see below), whose sum is σ = 419586048. Its totient is φ = 37324800.

The previous prime is 155668421. The next prime is 155668427. The reversal of 155668422 is 224866551.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155668421) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 287472 + ... + 288012.

It is an arithmetic number, because the mean of its divisors is an integer number (3278016).

Almost surely, 2^155668422 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155668422, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (209793024).

155668422 is an abundant number, since it is smaller than the sum of its proper divisors (263917626).

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

155668422 is a wasteful number, since it uses less digits than its factorization.

155668422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 614.

The product of its digits is 115200, while the sum is 39.

The square root of 155668422 is about 12476.7151927100. The cubic root of 155668422 is about 537.9395900533.

The spelling of 155668422 in words is "one hundred fifty-five million, six hundred sixty-eight thousand, four hundred twenty-two".