1373281640641 has 9 divisors (see below), whose sum is σ = 1396236195939. Its totient is φ = 1350698514600.

The previous prime is 1373281640623. The next prime is 1373281640651. The reversal of 1373281640641 is 1460461823731.

The square root of 1373281640641 is 1171871.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 44656565041 + 1328625075600 = 211321^2 + 1152660^2 .

It is not a de Polignac number, because 1373281640641 - 2²⁵ = 1373248086209 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1373281640591 and 1373281640600.

It is not an unprimeable number, because it can be changed into a prime (1373281640651) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 71474526 + ... + 71493736.

Almost surely, 2^{1373281640641} is an apocalyptic number.

1373281640641 is the 1171871-st square number.

1373281640641 is the 585936-th centered octagonal number.

It is an amenable number.

1373281640641 is a deficient number, since it is larger than the sum of its proper divisors (22954555298).

1373281640641 is an frugal number, since it uses more digits than its factorization.

1373281640641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38544 (or 19272 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 46.

The spelling of 1373281640641 in words is "one trillion, three hundred seventy-three billion, two hundred eighty-one million, six hundred forty thousand, six hundred forty-one".