1240553402351 has 2 divisors, whose sum is σ = 1240553402352. Its totient is φ = 1240553402350.

The previous prime is 1240553402339. The next prime is 1240553402393. The reversal of 1240553402351 is 1532043550421.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1240553402351 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1240553402651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 620276701175 + 620276701176.

It is an arithmetic number, because the mean of its divisors is an integer number (620276701176).

Almost surely, 2^{1240553402351} is an apocalyptic number.

1240553402351 is a deficient number, since it is larger than the sum of its proper divisors (1).

1240553402351 is an equidigital number, since it uses as much as digits as its factorization.

1240553402351 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72000, while the sum is 35.

Adding to 1240553402351 its reverse (1532043550421), we get a palindrome (2772596952772).

The spelling of 1240553402351 in words is "one trillion, two hundred forty billion, five hundred fifty-three million, four hundred two thousand, three hundred fifty-one".