11551516504387 has 2 divisors, whose sum is σ = 11551516504388. Its totient is φ = 11551516504386.

The previous prime is 11551516504289. The next prime is 11551516504427. The reversal of 11551516504387 is 78340561515511.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11551516504387 is a prime.

It is a super-2 number, since 2×11551516504387² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11551516505387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5775758252193 + 5775758252194.

It is an arithmetic number, because the mean of its divisors is an integer number (5775758252194).

Almost surely, 2^{11551516504387} is an apocalyptic number.

11551516504387 is a deficient number, since it is larger than the sum of its proper divisors (1).

11551516504387 is an equidigital number, since it uses as much as digits as its factorization.

11551516504387 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2520000, while the sum is 52.

The spelling of 11551516504387 in words is "eleven trillion, five hundred fifty-one billion, five hundred sixteen million, five hundred four thousand, three hundred eighty-seven".