11423951977 has 2 divisors, whose sum is σ = 11423951978. Its totient is φ = 11423951976.

The previous prime is 11423951969. The next prime is 11423952037. The reversal of 11423951977 is 77915932411.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5898854416 + 5525097561 = 76804^2 + 74331^2 .

It is a cyclic number.

It is not a de Polignac number, because 11423951977 - 2³ = 11423951969 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11423951977.

It is not a weakly prime, because it can be changed into another prime (11423951377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5711975988 + 5711975989.

It is an arithmetic number, because the mean of its divisors is an integer number (5711975989).

Almost surely, 2^11423951977 is an apocalyptic number.

It is an amenable number.

11423951977 is a deficient number, since it is larger than the sum of its proper divisors (1).

11423951977 is an equidigital number, since it uses as much as digits as its factorization.

11423951977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 476280, while the sum is 49.

The spelling of 11423951977 in words is "eleven billion, four hundred twenty-three million, nine hundred fifty-one thousand, nine hundred seventy-seven".