3518761840321 has 12 divisors (see below), whose sum is σ = 4408119229332. Its totient is φ = 2784075301728.

The previous prime is 3518761840303. The next prime is 3518761840327. The reversal of 3518761840321 is 1230481678153.

It can be written as a sum of positive squares in 2 ways, for example, as 1561250250000 + 1957511590321 = 1249500^2 + 1399111^2 .

It is not a de Polignac number, because 3518761840321 - 2⁵ = 3518761840289 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is not an unprimeable number, because it can be changed into a prime (3518761840327) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2761978830 + ... + 2761980103.

It is an arithmetic number, because the mean of its divisors is an integer number (367343269111).

Almost surely, 2^{3518761840321} is an apocalyptic number.

It is an amenable number.

3518761840321 is a deficient number, since it is larger than the sum of its proper divisors (889357389011).

3518761840321 is a wasteful number, since it uses less digits than its factorization.

3518761840321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5523958960 (or 5523958953 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 49.

The spelling of 3518761840321 in words is "three trillion, five hundred eighteen billion, seven hundred sixty-one million, eight hundred forty thousand, three hundred twenty-one".