1538461617 has 48 divisors (see below), whose sum is σ = 2588884992. Its totient is φ = 789445440.

The previous prime is 1538461607. The next prime is 1538461627. The reversal of 1538461617 is 7161648351.

It is an interprime number because it is at equal distance from previous prime (1538461607) and next prime (1538461627).

It is not a de Polignac number, because 1538461617 - 2⁸ = 1538461361 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1538461607) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6718059 + ... + 6718287.

It is an arithmetic number, because the mean of its divisors is an integer number (53935104).

Almost surely, 2^1538461617 is an apocalyptic number.

It is an amenable number.

1538461617 is a deficient number, since it is larger than the sum of its proper divisors (1050423375).

1538461617 is a wasteful number, since it uses less digits than its factorization.

1538461617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 606 (or 377 counting only the distinct ones).

The product of its digits is 120960, while the sum is 42.

The square root of 1538461617 is about 39223.2280288097. The cubic root of 1538461617 is about 1154.4156929086.

The spelling of 1538461617 in words is "one billion, five hundred thirty-eight million, four hundred sixty-one thousand, six hundred seventeen".