11775129997 has 2 divisors, whose sum is σ = 11775129998. Its totient is φ = 11775129996.

The previous prime is 11775129991. The next prime is 11775130039. The reversal of 11775129997 is 79992157711.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9151026921 + 2624103076 = 95661^2 + 51226^2 .

It is a cyclic number.

It is not a de Polignac number, because 11775129997 - 2³¹ = 9627646349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11775129991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5887564998 + 5887564999.

It is an arithmetic number, because the mean of its divisors is an integer number (5887564999).

Almost surely, 2^11775129997 is an apocalyptic number.

It is an amenable number.

11775129997 is a deficient number, since it is larger than the sum of its proper divisors (1).

11775129997 is an equidigital number, since it uses as much as digits as its factorization.

11775129997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2500470, while the sum is 58.

The spelling of 11775129997 in words is "eleven billion, seven hundred seventy-five million, one hundred twenty-nine thousand, nine hundred ninety-seven".