158221852618 has 16 divisors (see below), whose sum is σ = 239858542656. Its totient is φ = 78271493440.

The previous prime is 158221852597. The next prime is 158221852717. The reversal of 158221852618 is 816258122851.

It is a happy number.

It is a super-2 number, since 2×158221852618² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 494518 + ... + 748993.

It is an arithmetic number, because the mean of its divisors is an integer number (14991158916).

Almost surely, 2^158221852618 is an apocalyptic number.

158221852618 is a deficient number, since it is larger than the sum of its proper divisors (81636690038).

158221852618 is a wasteful number, since it uses less digits than its factorization.

158221852618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1244189.

The product of its digits is 614400, while the sum is 49.

The spelling of 158221852618 in words is "one hundred fifty-eight billion, two hundred twenty-one million, eight hundred fifty-two thousand, six hundred eighteen".