1601415617 has 4 divisors (see below), whose sum is σ = 1631631060. Its totient is φ = 1571200176.

The previous prime is 1601415539. The next prime is 1601415619. The reversal of 1601415617 is 7165141061.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7165141061 = 13 ⋅551164697.

It can be written as a sum of positive squares in 2 ways, for example, as 1413835201 + 187580416 = 37601^2 + 13696^2 .

It is a cyclic number.

It is not a de Polignac number, because 1601415617 - 2²⁸ = 1332980161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1601415619) 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, 15107642 + ... + 15107747.

It is an arithmetic number, because the mean of its divisors is an integer number (407907765).

Almost surely, 2^1601415617 is an apocalyptic number.

It is an amenable number.

1601415617 is a deficient number, since it is larger than the sum of its proper divisors (30215443).

1601415617 is an equidigital number, since it uses as much as digits as its factorization.

1601415617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30215442.

The product of its (nonzero) digits is 5040, while the sum is 32.

The square root of 1601415617 is about 40017.6913002237. The cubic root of 1601415617 is about 1169.9519343733.

Adding to 1601415617 its reverse (7165141061), we get a palindrome (8766556678).

The spelling of 1601415617 in words is "one billion, six hundred one million, four hundred fifteen thousand, six hundred seventeen".