155527642 has 4 divisors (see below), whose sum is σ = 233291466. Its totient is φ = 77763820.

The previous prime is 155527607. The next prime is 155527649. The reversal of 155527642 is 246725551.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 91030681 + 64496961 = 9541^2 + 8031^2 .

It is not an unprimeable number, because it can be changed into a prime (155527649) 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 as a sum of consecutive naturals, namely, 38881909 + ... + 38881912.

Almost surely, 2^155527642 is an apocalyptic number.

155527642 is a deficient number, since it is larger than the sum of its proper divisors (77763824).

155527642 is an equidigital number, since it uses as much as digits as its factorization.

155527642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77763823.

The product of its digits is 84000, while the sum is 37.

The square root of 155527642 is about 12471.0722073124. The cubic root of 155527642 is about 537.7773778004. Note that the first 3 decimals are identical.

The spelling of 155527642 in words is "one hundred fifty-five million, five hundred twenty-seven thousand, six hundred forty-two".