1439618340491 has 4 divisors (see below), whose sum is σ = 1474730982984. Its totient is φ = 1404505698000.

The previous prime is 1439618340469. The next prime is 1439618340613. The reversal of 1439618340491 is 1940438169341.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1439618340491 - 2¹⁴ = 1439618324107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1430618340491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17556321185 + ... + 17556321266.

It is an arithmetic number, because the mean of its divisors is an integer number (368682745746).

Almost surely, 2^{1439618340491} is an apocalyptic number.

1439618340491 is a deficient number, since it is larger than the sum of its proper divisors (35112642493).

1439618340491 is an equidigital number, since it uses as much as digits as its factorization.

1439618340491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35112642492.

The product of its (nonzero) digits is 2239488, while the sum is 53.

The spelling of 1439618340491 in words is "one trillion, four hundred thirty-nine billion, six hundred eighteen million, three hundred forty thousand, four hundred ninety-one".