23665432477 has 2 divisors, whose sum is σ = 23665432478. Its totient is φ = 23665432476.

The previous prime is 23665432451. The next prime is 23665432487. The reversal of 23665432477 is 77423456632.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21978359001 + 1687073476 = 148251^2 + 41074^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23665432477 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 23665432477.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23665432487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11832716238 + 11832716239.

It is an arithmetic number, because the mean of its divisors is an integer number (11832716239).

Almost surely, 2^23665432477 is an apocalyptic number.

It is an amenable number.

23665432477 is a deficient number, since it is larger than the sum of its proper divisors (1).

23665432477 is an equidigital number, since it uses as much as digits as its factorization.

23665432477 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5080320, while the sum is 49.

The spelling of 23665432477 in words is "twenty-three billion, six hundred sixty-five million, four hundred thirty-two thousand, four hundred seventy-seven".