1601610407 has 4 divisors (see below), whose sum is σ = 1603118160. Its totient is φ = 1600102656.

The previous prime is 1601610397. The next prime is 1601610421. The reversal of 1601610407 is 7040161061.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7040161061 = 31379 ⋅224359.

It is a cyclic number.

It is not a de Polignac number, because 1601610407 - 2⁴ = 1601610391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1601610427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 752282 + ... + 754407.

It is an arithmetic number, because the mean of its divisors is an integer number (400779540).

Almost surely, 2^1601610407 is an apocalyptic number.

1601610407 is a deficient number, since it is larger than the sum of its proper divisors (1507753).

1601610407 is a wasteful number, since it uses less digits than its factorization.

1601610407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1507752.

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 1601610407 is about 40020.1250247922. The cubic root of 1601610407 is about 1169.9993685924. Note that the first 3 decimals are identical.

Adding to 1601610407 its reverse (7040161061), we get a palindrome (8641771468).

The spelling of 1601610407 in words is "one billion, six hundred one million, six hundred ten thousand, four hundred seven".