23772665437 has 2 divisors, whose sum is σ = 23772665438. Its totient is φ = 23772665436.

The previous prime is 23772665359. The next prime is 23772665467. The reversal of 23772665437 is 73456627732.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13501045636 + 10271619801 = 116194^2 + 101349^2 .

It is a cyclic number.

It is not a de Polignac number, because 23772665437 - 2¹⁹ = 23772141149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23772665467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11886332718 + 11886332719.

It is an arithmetic number, because the mean of its divisors is an integer number (11886332719).

Almost surely, 2^23772665437 is an apocalyptic number.

It is an amenable number.

23772665437 is a deficient number, since it is larger than the sum of its proper divisors (1).

23772665437 is an equidigital number, since it uses as much as digits as its factorization.

23772665437 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8890560, while the sum is 52.

The spelling of 23772665437 in words is "twenty-three billion, seven hundred seventy-two million, six hundred sixty-five thousand, four hundred thirty-seven".