7458818861 has 4 divisors (see below), whose sum is σ = 8032574172. Its totient is φ = 6885063552.

The previous prime is 7458818827. The next prime is 7458818869. The reversal of 7458818861 is 1688188547.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1688188547 = 8291 ⋅203617.

It can be written as a sum of positive squares in 2 ways, for example, as 3193945225 + 4264873636 = 56515^2 + 65306^2 .

It is a cyclic number.

It is not a de Polignac number, because 7458818861 - 2¹⁸ = 7458556717 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7458818797 and 7458818806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7458818869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 286877636 + ... + 286877661.

It is an arithmetic number, because the mean of its divisors is an integer number (2008143543).

Almost surely, 2^7458818861 is an apocalyptic number.

It is an amenable number.

7458818861 is a deficient number, since it is larger than the sum of its proper divisors (573755311).

7458818861 is a wasteful number, since it uses less digits than its factorization.

7458818861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 573755310.

The product of its digits is 3440640, while the sum is 56.

The square root of 7458818861 is about 86364.4536890033. The cubic root of 7458818861 is about 1953.8446053369.

The spelling of 7458818861 in words is "seven billion, four hundred fifty-eight million, eight hundred eighteen thousand, eight hundred sixty-one".