143561631457 has 2 divisors, whose sum is σ = 143561631458. Its totient is φ = 143561631456.

The previous prime is 143561631419. The next prime is 143561631461. The reversal of 143561631457 is 754136165341.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 123372347536 + 20189283921 = 351244^2 + 142089^2 .

It is a cyclic number.

It is not a de Polignac number, because 143561631457 - 2¹⁹ = 143561107169 is a prime.

It is not a weakly prime, because it can be changed into another prime (143561631557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71780815728 + 71780815729.

It is an arithmetic number, because the mean of its divisors is an integer number (71780815729).

Almost surely, 2^143561631457 is an apocalyptic number.

It is an amenable number.

143561631457 is a deficient number, since it is larger than the sum of its proper divisors (1).

143561631457 is an equidigital number, since it uses as much as digits as its factorization.

143561631457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 907200, while the sum is 46.

Adding to 143561631457 its reverse (754136165341), we get a palindrome (897697796798).

The spelling of 143561631457 in words is "one hundred forty-three billion, five hundred sixty-one million, six hundred thirty-one thousand, four hundred fifty-seven".