43633542137 has 2 divisors, whose sum is σ = 43633542138. Its totient is φ = 43633542136.

The previous prime is 43633542089. The next prime is 43633542143. The reversal of 43633542137 is 73124533634.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25606720441 + 18026821696 = 160021^2 + 134264^2 .

It is a cyclic number.

It is not a de Polignac number, because 43633542137 - 2¹² = 43633538041 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 43633542094 and 43633542103.

It is not a weakly prime, because it can be changed into another prime (43633542637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21816771068 + 21816771069.

It is an arithmetic number, because the mean of its divisors is an integer number (21816771069).

Almost surely, 2^43633542137 is an apocalyptic number.

It is an amenable number.

43633542137 is a deficient number, since it is larger than the sum of its proper divisors (1).

43633542137 is an equidigital number, since it uses as much as digits as its factorization.

43633542137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 544320, while the sum is 41.

The spelling of 43633542137 in words is "forty-three billion, six hundred thirty-three million, five hundred forty-two thousand, one hundred thirty-seven".