1572481607261 has 2 divisors, whose sum is σ = 1572481607262. Its totient is φ = 1572481607260.

The previous prime is 1572481607237. The next prime is 1572481607293. The reversal of 1572481607261 is 1627061842751.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1541247760900 + 31233846361 = 1241470^2 + 176731^2 .

It is a cyclic number.

It is not a de Polignac number, because 1572481607261 - 2²⁶ = 1572414498397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1572481603261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 786240803630 + 786240803631.

It is an arithmetic number, because the mean of its divisors is an integer number (786240803631).

Almost surely, 2^{1572481607261} is an apocalyptic number.

It is an amenable number.

1572481607261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1572481607261 is an equidigital number, since it uses as much as digits as its factorization.

1572481607261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1128960, while the sum is 50.

The spelling of 1572481607261 in words is "one trillion, five hundred seventy-two billion, four hundred eighty-one million, six hundred seven thousand, two hundred sixty-one".