158222821864 has 16 divisors (see below), whose sum is σ = 299726223300. Its totient is φ = 78295828992.

The previous prime is 158222821853. The next prime is 158222821873. The reversal of 158222821864 is 468128222851.

It can be written as a sum of positive squares in 2 ways, for example, as 142009892964 + 16212928900 = 376842^2 + 127330^2 .

It is a super-2 number, since 2×158222821864² (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 3 ways as a sum of consecutive naturals, for example, 101946919 + ... + 101948470.

Almost surely, 2^158222821864 is an apocalyptic number.

It is an amenable number.

158222821864 is a deficient number, since it is larger than the sum of its proper divisors (141503401436).

158222821864 is a wasteful number, since it uses less digits than its factorization.

158222821864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203895492 (or 203895488 counting only the distinct ones).

The product of its digits is 983040, while the sum is 49.

The spelling of 158222821864 in words is "one hundred fifty-eight billion, two hundred twenty-two million, eight hundred twenty-one thousand, eight hundred sixty-four".