11715942891377 has 2 divisors, whose sum is σ = 11715942891378. Its totient is φ = 11715942891376.

The previous prime is 11715942891287. The next prime is 11715942891379. The reversal of 11715942891377 is 77319824951711.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9100092756496 + 2615850134881 = 3016636^2 + 1617359^2 .

It is a cyclic number.

It is not a de Polignac number, because 11715942891377 - 2¹² = 11715942887281 is a prime.

It is a super-2 number, since 2×11715942891377² (a number of 27 digits) contains 22 as substring.

Together with 11715942891379, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (11715942891379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5857971445688 + 5857971445689.

It is an arithmetic number, because the mean of its divisors is an integer number (5857971445689).

Almost surely, 2^{11715942891377} is an apocalyptic number.

It is an amenable number.

11715942891377 is a deficient number, since it is larger than the sum of its proper divisors (1).

11715942891377 is an equidigital number, since it uses as much as digits as its factorization.

11715942891377 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26671680, while the sum is 65.

The spelling of 11715942891377 in words is "eleven trillion, seven hundred fifteen billion, nine hundred forty-two million, eight hundred ninety-one thousand, three hundred seventy-seven".