1625041617 has 4 divisors (see below), whose sum is σ = 2166722160. Its totient is φ = 1083361076.

The previous prime is 1625041549. The next prime is 1625041619. The reversal of 1625041617 is 7161405261.

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.

It is a cyclic number.

It is not a de Polignac number, because 1625041617 - 2⁷ = 1625041489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1625041619) 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, 270840267 + ... + 270840272.

It is an arithmetic number, because the mean of its divisors is an integer number (541680540).

Almost surely, 2^1625041617 is an apocalyptic number.

It is an amenable number.

1625041617 is a deficient number, since it is larger than the sum of its proper divisors (541680543).

1625041617 is an equidigital number, since it uses as much as digits as its factorization.

1625041617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 541680542.

The product of its (nonzero) digits is 10080, while the sum is 33.

The square root of 1625041617 is about 40311.8049335427. The cubic root of 1625041617 is about 1175.6773802358.

Adding to 1625041617 its reverse (7161405261), we get a palindrome (8786446878).

The spelling of 1625041617 in words is "one billion, six hundred twenty-five million, forty-one thousand, six hundred seventeen".