11520511391 has 2 divisors, whose sum is σ = 11520511392. Its totient is φ = 11520511390.

The previous prime is 11520511339. The next prime is 11520511411. The reversal of 11520511391 is 19311502511.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11520511391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11520511291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5760255695 + 5760255696.

It is an arithmetic number, because the mean of its divisors is an integer number (5760255696).

Almost surely, 2^11520511391 is an apocalyptic number.

11520511391 is a deficient number, since it is larger than the sum of its proper divisors (1).

11520511391 is an equidigital number, since it uses as much as digits as its factorization.

11520511391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1350, while the sum is 29.

The spelling of 11520511391 in words is "eleven billion, five hundred twenty million, five hundred eleven thousand, three hundred ninety-one".