158790417856849 has 3 divisors (see below), whose sum is σ = 158790430458057. Its totient is φ = 158790405255642.

The previous prime is 158790417856789. The next prime is 158790417856891. The reversal of 158790417856849 is 948658714097851.

The square root of 158790417856849 is 12601207.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 158790417856849 - 2³³ = 158781827922257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (158790417836849) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 6300604 + ... + 18901810.

It is an arithmetic number, because the mean of its divisors is an integer number (52930143486019).

Almost surely, 2^{158790417856849} is an apocalyptic number.

158790417856849 is the 12601207-th square number.

158790417856849 is the 6300604-th centered octagonal number.

It is an amenable number.

158790417856849 is a deficient number, since it is larger than the sum of its proper divisors (12601208).

158790417856849 is an frugal number, since it uses more digits than its factorization.

158790417856849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25202414 (or 12601207 counting only the distinct ones).

The product of its (nonzero) digits is 4877107200, while the sum is 82.

The spelling of 158790417856849 in words is "one hundred fifty-eight trillion, seven hundred ninety billion, four hundred seventeen million, eight hundred fifty-six thousand, eight hundred forty-nine".