1610015601 has 4 divisors (see below), whose sum is σ = 2146687472. Its totient is φ = 1073343732.

The previous prime is 1610015599. The next prime is 1610015611. The reversal of 1610015601 is 1065100161.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1065100161 = 3 ⋅355033387.

It is not a de Polignac number, because 1610015601 - 2¹ = 1610015599 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1610015611) 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, 268335931 + ... + 268335936.

It is an arithmetic number, because the mean of its divisors is an integer number (536671868).

Almost surely, 2^1610015601 is an apocalyptic number.

It is an amenable number.

1610015601 is a deficient number, since it is larger than the sum of its proper divisors (536671871).

1610015601 is an equidigital number, since it uses as much as digits as its factorization.

1610015601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 536671870.

The product of its (nonzero) digits is 180, while the sum is 21.

The square root of 1610015601 is about 40124.9997009346. Note that the first 3 decimals coincide. The cubic root of 1610015601 is about 1172.0425035644.

Adding to 1610015601 its reverse (1065100161), we get a palindrome (2675115762).

The spelling of 1610015601 in words is "one billion, six hundred ten million, fifteen thousand, six hundred one".