1087787505061 has 2 divisors, whose sum is σ = 1087787505062. Its totient is φ = 1087787505060.

The previous prime is 1087787505053. The next prime is 1087787505073. The reversal of 1087787505061 is 1605057877801.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 605332236961 + 482455268100 = 778031^2 + 694590^2 .

It is a cyclic number.

It is not a de Polignac number, because 1087787505061 - 2³ = 1087787505053 is a prime.

It is a super-2 number, since 2×1087787505061² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1087787504993 and 1087787505011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1087787508061) 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, 543893752530 + 543893752531.

It is an arithmetic number, because the mean of its divisors is an integer number (543893752531).

Almost surely, 2^{1087787505061} is an apocalyptic number.

It is an amenable number.

1087787505061 is a deficient number, since it is larger than the sum of its proper divisors (1).

1087787505061 is an equidigital number, since it uses as much as digits as its factorization.

1087787505061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3292800, while the sum is 55.

The spelling of 1087787505061 in words is "one trillion, eighty-seven billion, seven hundred eighty-seven million, five hundred five thousand, sixty-one".