11776721519 has 2 divisors, whose sum is σ = 11776721520. Its totient is φ = 11776721518.

The previous prime is 11776721479. The next prime is 11776721543. The reversal of 11776721519 is 91512767711.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11776721519 is a prime.

It is a super-2 number, since 2×11776721519² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11776021519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5888360759 + 5888360760.

It is an arithmetic number, because the mean of its divisors is an integer number (5888360760).

Almost surely, 2^11776721519 is an apocalyptic number.

11776721519 is a deficient number, since it is larger than the sum of its proper divisors (1).

11776721519 is an equidigital number, since it uses as much as digits as its factorization.

11776721519 is an evil number, because the sum of its binary digits is even.

The product of its digits is 185220, while the sum is 47.

The spelling of 11776721519 in words is "eleven billion, seven hundred seventy-six million, seven hundred twenty-one thousand, five hundred nineteen".