1240508633857 has 2 divisors, whose sum is σ = 1240508633858. Its totient is φ = 1240508633856.

The previous prime is 1240508633851. The next prime is 1240508633867. The reversal of 1240508633857 is 7583368050421.

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., 753292069776 + 487216564081 = 867924^2 + 698009^2 .

It is a cyclic number.

It is not a de Polignac number, because 1240508633857 - 2¹⁵ = 1240508601089 is a prime.

It is not a weakly prime, because it can be changed into another prime (1240508633851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 620254316928 + 620254316929.

It is an arithmetic number, because the mean of its divisors is an integer number (620254316929).

Almost surely, 2^{1240508633857} is an apocalyptic number.

It is an amenable number.

1240508633857 is a deficient number, since it is larger than the sum of its proper divisors (1).

1240508633857 is an equidigital number, since it uses as much as digits as its factorization.

1240508633857 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4838400, while the sum is 52.

The spelling of 1240508633857 in words is "one trillion, two hundred forty billion, five hundred eight million, six hundred thirty-three thousand, eight hundred fifty-seven".