7481681778244 has 96 divisors (see below), whose sum is σ = 14526947635200. Its totient is φ = 3355370403840.

The previous prime is 7481681778239. The next prime is 7481681778253. The reversal of 7481681778244 is 4428771861847.

It is a self number, because there is not a number n which added to its sum of digits gives 7481681778244.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 902164162 + ... + 902172454.

It is an arithmetic number, because the mean of its divisors is an integer number (151322371200).

Almost surely, 2^{7481681778244} is an apocalyptic number.

It is an amenable number.

7481681778244 is a deficient number, since it is larger than the sum of its proper divisors (7045265856956).

7481681778244 is a wasteful number, since it uses less digits than its factorization.

7481681778244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14213 (or 14211 counting only the distinct ones).

The product of its digits is 134873088, while the sum is 67.

The spelling of 7481681778244 in words is "seven trillion, four hundred eighty-one billion, six hundred eighty-one million, seven hundred seventy-eight thousand, two hundred forty-four".