1247572199641 has 2 divisors, whose sum is σ = 1247572199642. Its totient is φ = 1247572199640.

The previous prime is 1247572199579. The next prime is 1247572199701. The reversal of 1247572199641 is 1469912757421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1239381225625 + 8190974016 = 1113275^2 + 90504^2 .

It is a cyclic number.

It is not a de Polignac number, because 1247572199641 - 2¹¹ = 1247572197593 is a prime.

It is not a weakly prime, because it can be changed into another prime (1247573199641) 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 as a sum of consecutive naturals, namely, 623786099820 + 623786099821.

It is an arithmetic number, because the mean of its divisors is an integer number (623786099821).

Almost surely, 2^{1247572199641} is an apocalyptic number.

It is an amenable number.

1247572199641 is a deficient number, since it is larger than the sum of its proper divisors (1).

1247572199641 is an equidigital number, since it uses as much as digits as its factorization.

1247572199641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7620480, while the sum is 58.

The spelling of 1247572199641 in words is "one trillion, two hundred forty-seven billion, five hundred seventy-two million, one hundred ninety-nine thousand, six hundred forty-one".