7842720559 has 4 divisors (see below), whose sum is σ = 7846173216. Its totient is φ = 7839267904.

The previous prime is 7842720541. The next prime is 7842720583. The reversal of 7842720559 is 9550272487.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9550272487 = 7 ⋅1364324641.

It is a cyclic number.

It is not a de Polignac number, because 7842720559 - 2²¹ = 7840623407 is a prime.

It is a super-2 number, since 2×7842720559² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7842720539) 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, 1722919 + ... + 1727464.

It is an arithmetic number, because the mean of its divisors is an integer number (1961543304).

Almost surely, 2^7842720559 is an apocalyptic number.

7842720559 is a deficient number, since it is larger than the sum of its proper divisors (3452657).

7842720559 is a wasteful number, since it uses less digits than its factorization.

7842720559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3452656.

The product of its (nonzero) digits is 1411200, while the sum is 49.

The square root of 7842720559 is about 88559.1359431651. The cubic root of 7842720559 is about 1986.8065375706.

The spelling of 7842720559 in words is "seven billion, eight hundred forty-two million, seven hundred twenty thousand, five hundred fifty-nine".