11995709477 has 2 divisors, whose sum is σ = 11995709478. Its totient is φ = 11995709476.

The previous prime is 11995709393. The next prime is 11995709533. The reversal of 11995709477 is 77490759911.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7061208961 + 4934500516 = 84031^2 + 70246^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11995709477 is a prime.

It is a super-2 number, since 2×11995709477² (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 (11995708477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5997854738 + 5997854739.

It is an arithmetic number, because the mean of its divisors is an integer number (5997854739).

Almost surely, 2^11995709477 is an apocalyptic number.

It is an amenable number.

11995709477 is a deficient number, since it is larger than the sum of its proper divisors (1).

11995709477 is an equidigital number, since it uses as much as digits as its factorization.

11995709477 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5000940, while the sum is 59.

The spelling of 11995709477 in words is "eleven billion, nine hundred ninety-five million, seven hundred nine thousand, four hundred seventy-seven".