1615340435161 has 4 divisors (see below), whose sum is σ = 1615374595252. Its totient is φ = 1615306275072.

The previous prime is 1615340435147. The next prime is 1615340435197.

It is a happy number.

1615340435161 is nontrivially palindromic in base 10.

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 523388583936 + 1091951851225 = 723456^2 + 1044965^2 .

It is a cyclic number.

It is not a de Polignac number, because 1615340435161 - 2⁹ = 1615340434649 is a prime.

It is a super-2 number, since 2×1615340435161² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1615340435861) 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, 17009016 + ... + 17103721.

It is an arithmetic number, because the mean of its divisors is an integer number (403843648813).

Almost surely, 2^{1615340435161} is an apocalyptic number.

It is an amenable number.

1615340435161 is a deficient number, since it is larger than the sum of its proper divisors (34160091).

1615340435161 is an equidigital number, since it uses as much as digits as its factorization.

1615340435161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34160090.

The product of its (nonzero) digits is 129600, while the sum is 40.

The spelling of 1615340435161 in words is "one trillion, six hundred fifteen billion, three hundred forty million, four hundred thirty-five thousand, one hundred sixty-one".