1200505356553 has 2 divisors, whose sum is σ = 1200505356554. Its totient is φ = 1200505356552.

The previous prime is 1200505356521. The next prime is 1200505356577. The reversal of 1200505356553 is 3556535050021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1047599331529 + 152906025024 = 1023523^2 + 391032^2 .

It is a cyclic number.

It is not a de Polignac number, because 1200505356553 - 2⁵ = 1200505356521 is a prime.

It is a super-2 number, since 2×1200505356553² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1200505356593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600252678276 + 600252678277.

It is an arithmetic number, because the mean of its divisors is an integer number (600252678277).

Almost surely, 2^{1200505356553} is an apocalyptic number.

It is an amenable number.

1200505356553 is a deficient number, since it is larger than the sum of its proper divisors (1).

1200505356553 is an equidigital number, since it uses as much as digits as its factorization.

1200505356553 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 337500, while the sum is 40.

The spelling of 1200505356553 in words is "one trillion, two hundred billion, five hundred five million, three hundred fifty-six thousand, five hundred fifty-three".