1240508633869 has 2 divisors, whose sum is σ = 1240508633870. Its totient is φ = 1240508633868.

The previous prime is 1240508633867. The next prime is 1240508633909. The reversal of 1240508633869 is 9683368050421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1129463068644 + 111045565225 = 1062762^2 + 333235^2 .

It is a cyclic number.

It is not a de Polignac number, because 1240508633869 - 2¹ = 1240508633867 is a prime.

It is a super-2 number, since 2×1240508633869² (a number of 25 digits) contains 22 as substring.

Together with 1240508633867, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1240508633867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 620254316934 + 620254316935.

It is an arithmetic number, because the mean of its divisors is an integer number (620254316935).

Almost surely, 2^{1240508633869} is an apocalyptic number.

It is an amenable number.

1240508633869 is a deficient number, since it is larger than the sum of its proper divisors (1).

1240508633869 is an equidigital number, since it uses as much as digits as its factorization.

1240508633869 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7464960, while the sum is 55.

The spelling of 1240508633869 in words is "one trillion, two hundred forty billion, five hundred eight million, six hundred thirty-three thousand, eight hundred sixty-nine".