1087537852781 has 2 divisors, whose sum is σ = 1087537852782. Its totient is φ = 1087537852780.

The previous prime is 1087537852759. The next prime is 1087537852883. The reversal of 1087537852781 is 1872587357801.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 915914077156 + 171623775625 = 957034^2 + 414275^2 .

It is an emirp because it is prime and its reverse (1872587357801) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1087537852781 - 2¹⁴ = 1087537836397 is a prime.

It is a super-2 number, since 2×1087537852781² (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 (1087537857781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 543768926390 + 543768926391.

It is an arithmetic number, because the mean of its divisors is an integer number (543768926391).

Almost surely, 2^{1087537852781} is an apocalyptic number.

It is an amenable number.

1087537852781 is a deficient number, since it is larger than the sum of its proper divisors (1).

1087537852781 is an equidigital number, since it uses as much as digits as its factorization.

1087537852781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26342400, while the sum is 62.

The spelling of 1087537852781 in words is "one trillion, eighty-seven billion, five hundred thirty-seven million, eight hundred fifty-two thousand, seven hundred eighty-one".