1087787505109 has 2 divisors, whose sum is σ = 1087787505110. Its totient is φ = 1087787505108.

The previous prime is 1087787505073. The next prime is 1087787505143. The reversal of 1087787505109 is 9015057877801.

1087787505109 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1055750085009 + 32037420100 = 1027497^2 + 178990^2 .

It is a cyclic number.

It is not a de Polignac number, because 1087787505109 - 2⁹ = 1087787504597 is a prime.

It is a super-2 number, since 2×1087787505109² (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 (1087787505179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 543893752554 + 543893752555.

It is an arithmetic number, because the mean of its divisors is an integer number (543893752555).

Almost surely, 2^{1087787505109} is an apocalyptic number.

It is an amenable number.

1087787505109 is a deficient number, since it is larger than the sum of its proper divisors (1).

1087787505109 is an equidigital number, since it uses as much as digits as its factorization.

1087787505109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4939200, while the sum is 58.

The spelling of 1087787505109 in words is "one trillion, eighty-seven billion, seven hundred eighty-seven million, five hundred five thousand, one hundred nine".