1531704425873 has 2 divisors, whose sum is σ = 1531704425874. Its totient is φ = 1531704425872.

The previous prime is 1531704425827. The next prime is 1531704425879. The reversal of 1531704425873 is 3785244071351.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1529545615504 + 2158810369 = 1236748^2 + 46463^2 .

It is a cyclic number.

It is not a de Polignac number, because 1531704425873 - 2⁸ = 1531704425617 is a prime.

It is a super-2 number, since 2×1531704425873² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1531704425879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 765852212936 + 765852212937.

It is an arithmetic number, because the mean of its divisors is an integer number (765852212937).

Almost surely, 2^{1531704425873} is an apocalyptic number.

It is an amenable number.

1531704425873 is a deficient number, since it is larger than the sum of its proper divisors (1).

1531704425873 is an equidigital number, since it uses as much as digits as its factorization.

1531704425873 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2822400, while the sum is 50.

The spelling of 1531704425873 in words is "one trillion, five hundred thirty-one billion, seven hundred four million, four hundred twenty-five thousand, eight hundred seventy-three".