1245572311537 has 2 divisors, whose sum is σ = 1245572311538. Its totient is φ = 1245572311536.

The previous prime is 1245572311513. The next prime is 1245572311553. The reversal of 1245572311537 is 7351132755421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1181919039921 + 63653271616 = 1087161^2 + 252296^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1245572311537 is a prime.

It is not a weakly prime, because it can be changed into another prime (1245572311507) 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, 622786155768 + 622786155769.

It is an arithmetic number, because the mean of its divisors is an integer number (622786155769).

Almost surely, 2^{1245572311537} is an apocalyptic number.

It is an amenable number.

1245572311537 is a deficient number, since it is larger than the sum of its proper divisors (1).

1245572311537 is an equidigital number, since it uses as much as digits as its factorization.

1245572311537 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 882000, while the sum is 46.

The spelling of 1245572311537 in words is "one trillion, two hundred forty-five billion, five hundred seventy-two million, three hundred eleven thousand, five hundred thirty-seven".