1056635512531 has 2 divisors, whose sum is σ = 1056635512532. Its totient is φ = 1056635512530.

The previous prime is 1056635512477. The next prime is 1056635512573. The reversal of 1056635512531 is 1352155366501.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1056635512531 - 2³¹ = 1054488028883 is a prime.

It is a super-3 number, since 3×1056635512531³ (a number of 37 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (1056635212531) 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, 528317756265 + 528317756266.

It is an arithmetic number, because the mean of its divisors is an integer number (528317756266).

Almost surely, 2^{1056635512531} is an apocalyptic number.

1056635512531 is a deficient number, since it is larger than the sum of its proper divisors (1).

1056635512531 is an equidigital number, since it uses as much as digits as its factorization.

1056635512531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 405000, while the sum is 43.

The spelling of 1056635512531 in words is "one trillion, fifty-six billion, six hundred thirty-five million, five hundred twelve thousand, five hundred thirty-one".