1615144614641 has 4 divisors (see below), whose sum is σ = 1617111904884. Its totient is φ = 1613177324400.

The previous prime is 1615144614571. The next prime is 1615144614697. The reversal of 1615144614641 is 1464164415161.

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 163591936225 + 1451552678416 = 404465^2 + 1204804^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1615144614641 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1615144614592 and 1615144614601.

It is not an unprimeable number, because it can be changed into a prime (1615144614541) 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, 983643890 + ... + 983645531.

It is an arithmetic number, because the mean of its divisors is an integer number (404277976221).

Almost surely, 2^{1615144614641} is an apocalyptic number.

It is an amenable number.

1615144614641 is a deficient number, since it is larger than the sum of its proper divisors (1967290243).

1615144614641 is an equidigital number, since it uses as much as digits as its factorization.

1615144614641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1967290242.

The product of its digits is 276480, while the sum is 44.

The spelling of 1615144614641 in words is "one trillion, six hundred fifteen billion, one hundred forty-four million, six hundred fourteen thousand, six hundred forty-one".