150243661 has 8 divisors (see below), whose sum is σ = 152279064. Its totient is φ = 148219200.

The previous prime is 150243649. The next prime is 150243679. The reversal of 150243661 is 166342051.

It can be written as a sum of positive squares in 4 ways, for example, as 137030436 + 13213225 = 11706^2 + 3635^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 150243661 - 2⁵ = 150243629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (150243361) 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 7 ways as a sum of consecutive naturals, for example, 27055 + ... + 32131.

It is an arithmetic number, because the mean of its divisors is an integer number (19034883).

Almost surely, 2^150243661 is an apocalyptic number.

It is an amenable number.

150243661 is a deficient number, since it is larger than the sum of its proper divisors (2035403).

150243661 is a wasteful number, since it uses less digits than its factorization.

150243661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5471.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 150243661 is about 12257.3920962006. The cubic root of 150243661 is about 531.6168272294.

The spelling of 150243661 in words is "one hundred fifty million, two hundred forty-three thousand, six hundred sixty-one".