158216646 has 16 divisors (see below), whose sum is σ = 361638144. Its totient is φ = 45204744.

The previous prime is 158216627. The next prime is 158216647. The reversal of 158216646 is 646612851.

It is a happy number.

158216646 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158216647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1883490 + ... + 1883573.

It is an arithmetic number, because the mean of its divisors is an integer number (22602384).

Almost surely, 2^158216646 is an apocalyptic number.

158216646 is an abundant number, since it is smaller than the sum of its proper divisors (203421498).

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

158216646 is a wasteful number, since it uses less digits than its factorization.

158216646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3767075.

The product of its digits is 69120, while the sum is 39.

The square root of 158216646 is about 12578.4198530658. The cubic root of 158216646 is about 540.8589963524.

The spelling of 158216646 in words is "one hundred fifty-eight million, two hundred sixteen thousand, six hundred forty-six".