1615204025161 has 4 divisors (see below), whose sum is σ = 1631196144324. Its totient is φ = 1599211906000.

The previous prime is 1615204025107. The next prime is 1615204025273.

1615204025161 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 1359658609936 + 255545415225 = 1166044^2 + 505515^2 .

It is a cyclic number.

It is not a de Polignac number, because 1615204025161 - 2⁹ = 1615204024649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1615204025101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7996059430 + ... + 7996059631.

It is an arithmetic number, because the mean of its divisors is an integer number (407799036081).

Almost surely, 2^{1615204025161} is an apocalyptic number.

It is an amenable number.

1615204025161 is a deficient number, since it is larger than the sum of its proper divisors (15992119163).

1615204025161 is a wasteful number, since it uses less digits than its factorization.

1615204025161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15992119162.

The product of its (nonzero) digits is 14400, while the sum is 34.

The spelling of 1615204025161 in words is "one trillion, six hundred fifteen billion, two hundred four million, twenty-five thousand, one hundred sixty-one".