158578721443 has 32 divisors (see below), whose sum is σ = 170254094400. Its totient is φ = 147271550976.

The previous prime is 158578721407. The next prime is 158578721453. The reversal of 158578721443 is 344127875851.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-158578721443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (158578721453) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 109138105 + ... + 109139557.

It is an arithmetic number, because the mean of its divisors is an integer number (5320440450).

Almost surely, 2^158578721443 is an apocalyptic number.

158578721443 is a deficient number, since it is larger than the sum of its proper divisors (11675372957).

158578721443 is a wasteful number, since it uses less digits than its factorization.

158578721443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2071.

The product of its digits is 7526400, while the sum is 55.

The spelling of 158578721443 in words is "one hundred fifty-eight billion, five hundred seventy-eight million, seven hundred twenty-one thousand, four hundred forty-three".