7842619517 has 4 divisors (see below), whose sum is σ = 7842932796. Its totient is φ = 7842306240.

The previous prime is 7842619481. The next prime is 7842619591. The reversal of 7842619517 is 7159162487.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7159162487 = 73 ⋅98070719.

It can be written as a sum of positive squares in 2 ways, for example, as 5316451396 + 2526168121 = 72914^2 + 50261^2 .

It is a cyclic number.

It is not a de Polignac number, because 7842619517 - 2⁸ = 7842619261 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 (7842619217) 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, 115484 + ... + 170357.

It is an arithmetic number, because the mean of its divisors is an integer number (1960733199).

Almost surely, 2^7842619517 is an apocalyptic number.

It is an amenable number.

7842619517 is a deficient number, since it is larger than the sum of its proper divisors (313279).

7842619517 is a wasteful number, since it uses less digits than its factorization.

7842619517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313278.

The product of its digits is 846720, while the sum is 50.

The square root of 7842619517 is about 88558.5654637653. The cubic root of 7842619517 is about 1986.7980051671.

The spelling of 7842619517 in words is "seven billion, eight hundred forty-two million, six hundred nineteen thousand, five hundred seventeen".