155440164 has 48 divisors (see below), whose sum is σ = 412876800. Its totient is φ = 45054240.

The previous prime is 155440147. The next prime is 155440211. The reversal of 155440164 is 461044551.

It is an unprimeable number.

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, 22564 + ... + 28635.

It is an arithmetic number, because the mean of its divisors is an integer number (8601600).

Almost surely, 2^155440164 is an apocalyptic number.

It is an amenable number.

155440164 is an abundant number, since it is smaller than the sum of its proper divisors (257436636).

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

155440164 is a wasteful number, since it uses less digits than its factorization.

155440164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51240 (or 51238 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 30.

The square root of 155440164 is about 12467.5644774751. The cubic root of 155440164 is about 537.6765328923.

The spelling of 155440164 in words is "one hundred fifty-five million, four hundred forty thousand, one hundred sixty-four".