158603649 has 4 divisors (see below), whose sum is σ = 211471536. Its totient is φ = 105735764.

The previous prime is 158603647. The next prime is 158603663. The reversal of 158603649 is 946306851.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 158603649 - 2¹ = 158603647 is a prime.

It is a super-2 number, since 2×158603649² = 50310234952230402, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 158603649.

It is not an unprimeable number, because it can be changed into a prime (158603647) 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 3 ways as a sum of consecutive naturals, for example, 26433939 + ... + 26433944.

It is an arithmetic number, because the mean of its divisors is an integer number (52867884).

Almost surely, 2^158603649 is an apocalyptic number.

It is an amenable number.

158603649 is a deficient number, since it is larger than the sum of its proper divisors (52867887).

158603649 is an equidigital number, since it uses as much as digits as its factorization.

158603649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52867886.

The product of its (nonzero) digits is 155520, while the sum is 42.

The square root of 158603649 is about 12593.7940669204. The cubic root of 158603649 is about 541.2996234462.

The spelling of 158603649 in words is "one hundred fifty-eight million, six hundred three thousand, six hundred forty-nine".