71499808837 has 2 divisors, whose sum is σ = 71499808838. Its totient is φ = 71499808836.

The previous prime is 71499808813. The next prime is 71499808847. The reversal of 71499808837 is 73880899417.

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., 45048364516 + 26451444321 = 212246^2 + 162639^2 .

It is a cyclic number.

It is not a de Polignac number, because 71499808837 - 2²³ = 71491420229 is a prime.

It is a super-2 number, since 2×71499808837² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71499808847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35749904418 + 35749904419.

It is an arithmetic number, because the mean of its divisors is an integer number (35749904419).

Almost surely, 2^71499808837 is an apocalyptic number.

It is an amenable number.

71499808837 is a deficient number, since it is larger than the sum of its proper divisors (1).

71499808837 is an equidigital number, since it uses as much as digits as its factorization.

71499808837 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24385536, while the sum is 64.

The spelling of 71499808837 in words is "seventy-one billion, four hundred ninety-nine million, eight hundred eight thousand, eight hundred thirty-seven".