52138537537 has 2 divisors, whose sum is σ = 52138537538. Its totient is φ = 52138537536.

The previous prime is 52138537489. The next prime is 52138537541. The reversal of 52138537537 is 73573583125.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35548839936 + 16589697601 = 188544^2 + 128801^2 .

It is a cyclic number.

It is not a de Polignac number, because 52138537537 - 2²³ = 52130148929 is a prime.

It is not a weakly prime, because it can be changed into another prime (52138537567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26069268768 + 26069268769.

It is an arithmetic number, because the mean of its divisors is an integer number (26069268769).

Almost surely, 2^52138537537 is an apocalyptic number.

It is an amenable number.

52138537537 is a deficient number, since it is larger than the sum of its proper divisors (1).

52138537537 is an equidigital number, since it uses as much as digits as its factorization.

52138537537 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2646000, while the sum is 49.

The spelling of 52138537537 in words is "fifty-two billion, one hundred thirty-eight million, five hundred thirty-seven thousand, five hundred thirty-seven".