136243446457 has 4 divisors (see below), whose sum is σ = 136854403840. Its totient is φ = 135632489076.

The previous prime is 136243446419. The next prime is 136243446473. The reversal of 136243446457 is 754644342631.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 754644342631 = 101833 ⋅7410607.

It is a cyclic number.

It is not a de Polignac number, because 136243446457 - 2¹⁵ = 136243413689 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 136243446457.

It is not an unprimeable number, because it can be changed into a prime (136243440457) 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, 305478357 + ... + 305478802.

It is an arithmetic number, because the mean of its divisors is an integer number (34213600960).

Almost surely, 2^136243446457 is an apocalyptic number.

It is an amenable number.

136243446457 is a deficient number, since it is larger than the sum of its proper divisors (610957383).

136243446457 is an equidigital number, since it uses as much as digits as its factorization.

136243446457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 610957382.

The product of its digits is 5806080, while the sum is 49.

The spelling of 136243446457 in words is "one hundred thirty-six billion, two hundred forty-three million, four hundred forty-six thousand, four hundred fifty-seven".