158195244397 has 4 divisors (see below), whose sum is σ = 158221454716. Its totient is φ = 158169034080.

The previous prime is 158195244349. The next prime is 158195244409. The reversal of 158195244397 is 793442591851.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 105023957476 + 53171286921 = 324074^2 + 230589^2 .

It is a cyclic number.

It is not a de Polignac number, because 158195244397 - 2⁷ = 158195244269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158195244797) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13096104 + ... + 13108177.

It is an arithmetic number, because the mean of its divisors is an integer number (39555363679).

Almost surely, 2^158195244397 is an apocalyptic number.

It is an amenable number.

158195244397 is a deficient number, since it is larger than the sum of its proper divisors (26210319).

158195244397 is an equidigital number, since it uses as much as digits as its factorization.

158195244397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26210318.

The product of its digits is 10886400, while the sum is 58.

The spelling of 158195244397 in words is "one hundred fifty-eight billion, one hundred ninety-five million, two hundred forty-four thousand, three hundred ninety-seven".