7431918842881 has 8 divisors (see below), whose sum is σ = 8198814784104. Its totient is φ = 6692910026880.

The previous prime is 7431918842879. The next prime is 7431918842917. The reversal of 7431918842881 is 1882488191347.

It can be written as a sum of positive squares in 4 ways, for example, as 67072712256 + 7364846130625 = 258984^2 + 2713825^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7431918842881 - 2¹ = 7431918842879 is a prime.

It is a super-2 number, since 2×7431918842881² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7431918842851) 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 7 ways as a sum of consecutive naturals, for example, 6971780746 + ... + 6971781811.

It is an arithmetic number, because the mean of its divisors is an integer number (1024851848013).

Almost surely, 2^{7431918842881} is an apocalyptic number.

It is an amenable number.

7431918842881 is a deficient number, since it is larger than the sum of its proper divisors (766895941223).

7431918842881 is a wasteful number, since it uses less digits than its factorization.

7431918842881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13943562611.

The product of its digits is 24772608, while the sum is 64.

The spelling of 7431918842881 in words is "seven trillion, four hundred thirty-one billion, nine hundred eighteen million, eight hundred forty-two thousand, eight hundred eighty-one".