155442564 has 30 divisors (see below), whose sum is σ = 406358414. Its totient is φ = 51814080.

The previous prime is 155442559. The next prime is 155442569. The reversal of 155442564 is 465244551.

155442564 is a `hidden beast` number, since 1 + 5 + 54 + 42 + 564 = 666.

It is an interprime number because it is at equal distance from previous prime (155442559) and next prime (155442569).

It can be written as a sum of positive squares in only one way, i.e., 134374464 + 21068100 = 11592^2 + 4590^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (155442569) 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 9 ways as a sum of consecutive naturals, for example, 239557 + ... + 240204.

Almost surely, 2^155442564 is an apocalyptic number.

It is an amenable number.

155442564 is an abundant number, since it is smaller than the sum of its proper divisors (250915850).

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

155442564 is a wasteful number, since it uses less digits than its factorization.

155442564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 479777 (or 479766 counting only the distinct ones).

The product of its digits is 96000, while the sum is 36.

The square root of 155442564 is about 12467.6607268565. The cubic root of 155442564 is about 537.6793001244.

The spelling of 155442564 in words is "one hundred fifty-five million, four hundred forty-two thousand, five hundred sixty-four".