1240137457511 has 2 divisors, whose sum is σ = 1240137457512. Its totient is φ = 1240137457510.

The previous prime is 1240137457411. The next prime is 1240137457513. The reversal of 1240137457511 is 1157547310421.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1240137457511 is a prime.

It is a Sophie Germain prime.

Together with 1240137457513, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1240137457513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 620068728755 + 620068728756.

It is an arithmetic number, because the mean of its divisors is an integer number (620068728756).

Almost surely, 2^{1240137457511} is an apocalyptic number.

1240137457511 is a deficient number, since it is larger than the sum of its proper divisors (1).

1240137457511 is an equidigital number, since it uses as much as digits as its factorization.

1240137457511 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 117600, while the sum is 41.

The spelling of 1240137457511 in words is "one trillion, two hundred forty billion, one hundred thirty-seven million, four hundred fifty-seven thousand, five hundred eleven".