1601817025 has 6 divisors (see below), whose sum is σ = 1986253142. Its totient is φ = 1281453600.

The previous prime is 1601817023. The next prime is 1601817029. The reversal of 1601817025 is 5207181061.

It can be written as a sum of positive squares in 3 ways, for example, as 149597361 + 1452219664 = 12231^2 + 38108^2 .

It is not a de Polignac number, because 1601817025 - 2¹ = 1601817023 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1601817023) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 32036316 + ... + 32036365.

Almost surely, 2^1601817025 is an apocalyptic number.

It is an amenable number.

1601817025 is a deficient number, since it is larger than the sum of its proper divisors (384436117).

1601817025 is an equidigital number, since it uses as much as digits as its factorization.

1601817025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64072691 (or 64072686 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 31.

The square root of 1601817025 is about 40022.7063677608. The cubic root of 1601817025 is about 1170.0496788997.

Adding to 1601817025 its reverse (5207181061), we get a palindrome (6808998086).

The spelling of 1601817025 in words is "one billion, six hundred one million, eight hundred seventeen thousand, twenty-five".