1240351551979 has 2 divisors, whose sum is σ = 1240351551980. Its totient is φ = 1240351551978.

The previous prime is 1240351551961. The next prime is 1240351552001. The reversal of 1240351551979 is 9791551530421.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1240351551979 - 2¹⁷ = 1240351420907 is a prime.

It is not a weakly prime, because it can be changed into another prime (1240351551479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 620175775989 + 620175775990.

It is an arithmetic number, because the mean of its divisors is an integer number (620175775990).

Almost surely, 2^{1240351551979} is an apocalyptic number.

1240351551979 is a deficient number, since it is larger than the sum of its proper divisors (1).

1240351551979 is an equidigital number, since it uses as much as digits as its factorization.

1240351551979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1701000, while the sum is 52.

The spelling of 1240351551979 in words is "one trillion, two hundred forty billion, three hundred fifty-one million, five hundred fifty-one thousand, nine hundred seventy-nine".