71526434537 has 2 divisors, whose sum is σ = 71526434538. Its totient is φ = 71526434536.

The previous prime is 71526434453. The next prime is 71526434579. The reversal of 71526434537 is 73543462517.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71512921561 + 13512976 = 267419^2 + 3676^2 .

It is a cyclic number.

It is not a de Polignac number, because 71526434537 - 2¹⁰ = 71526433513 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 71526434491 and 71526434500.

It is not a weakly prime, because it can be changed into another prime (71526434587) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35763217268 + 35763217269.

It is an arithmetic number, because the mean of its divisors is an integer number (35763217269).

Almost surely, 2^71526434537 is an apocalyptic number.

It is an amenable number.

71526434537 is a deficient number, since it is larger than the sum of its proper divisors (1).

71526434537 is an equidigital number, since it uses as much as digits as its factorization.

71526434537 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2116800, while the sum is 47.

The spelling of 71526434537 in words is "seventy-one billion, five hundred twenty-six million, four hundred thirty-four thousand, five hundred thirty-seven".