2781721130474 has 96 divisors (see below), whose sum is σ = 4961089710720. Its totient is φ = 1159579948800.

The previous prime is 2781721130429. The next prime is 2781721130509. The reversal of 2781721130474 is 4740311271872.

It is a happy number.

It is a super-3 number, since 3×2781721130474³ (a number of 38 digits) contains 333 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 366542672 + ... + 366550260.

It is an arithmetic number, because the mean of its divisors is an integer number (51678017820).

Almost surely, 2^{2781721130474} is an apocalyptic number.

2781721130474 is a deficient number, since it is larger than the sum of its proper divisors (2179368580246).

2781721130474 is a wasteful number, since it uses less digits than its factorization.

2781721130474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8256 (or 8243 counting only the distinct ones).

The product of its (nonzero) digits is 526848, while the sum is 47.

The spelling of 2781721130474 in words is "two trillion, seven hundred eighty-one billion, seven hundred twenty-one million, one hundred thirty thousand, four hundred seventy-four".