1005605010551 has 2 divisors, whose sum is σ = 1005605010552. Its totient is φ = 1005605010550.

The previous prime is 1005605010547. The next prime is 1005605010581. The reversal of 1005605010551 is 1550105065001.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1005605010551 - 2² = 1005605010547 is a prime.

It is a super-2 number, since 2×1005605010551² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1005605010511) 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, 502802505275 + 502802505276.

It is an arithmetic number, because the mean of its divisors is an integer number (502802505276).

Almost surely, 2^{1005605010551} is an apocalyptic number.

1005605010551 is a deficient number, since it is larger than the sum of its proper divisors (1).

1005605010551 is an equidigital number, since it uses as much as digits as its factorization.

1005605010551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3750, while the sum is 29.

The spelling of 1005605010551 in words is "one trillion, five billion, six hundred five million, ten thousand, five hundred fifty-one".