155522660 has 48 divisors (see below), whose sum is σ = 341978112. Its totient is φ = 59337600.

The previous prime is 155522641. The next prime is 155522663. The reversal of 155522660 is 66225551.

It is not an unprimeable number, because it can be changed into a prime (155522663) 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 15 ways as a sum of consecutive naturals, for example, 42254 + ... + 45786.

It is an arithmetic number, because the mean of its divisors is an integer number (7124544).

Almost surely, 2^155522660 is an apocalyptic number.

155522660 is a gapful number since it is divisible by the number (10) 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 155522660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (170989056).

155522660 is an abundant number, since it is smaller than the sum of its proper divisors (186455452).

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

155522660 is a wasteful number, since it uses less digits than its factorization.

155522660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3644 (or 3642 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 32.

The square root of 155522660 is about 12470.8724634646. The cubic root of 155522660 is about 537.7716355510.

The spelling of 155522660 in words is "one hundred fifty-five million, five hundred twenty-two thousand, six hundred sixty".