158405805643 has 6 divisors (see below), whose sum is σ = 165592459004. Its totient is φ = 151518596196.

The previous prime is 158405805631. The next prime is 158405805653. The reversal of 158405805643 is 346508504851.

It is a de Polignac number, because none of the positive numbers 2^k-158405805643 is a prime.

It is a super-2 number, since 2×158405805643² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (158405805653) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 149721405 + ... + 149722462.

Almost surely, 2^158405805643 is an apocalyptic number.

158405805643 is a deficient number, since it is larger than the sum of its proper divisors (7186653361).

158405805643 is an equidigital number, since it uses as much as digits as its factorization.

158405805643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299443913 (or 299443890 counting only the distinct ones).

The product of its (nonzero) digits is 2304000, while the sum is 49.

The spelling of 158405805643 in words is "one hundred fifty-eight billion, four hundred five million, eight hundred five thousand, six hundred forty-three".