71647902737 has 2 divisors, whose sum is σ = 71647902738. Its totient is φ = 71647902736.

The previous prime is 71647902719. The next prime is 71647902751. The reversal of 71647902737 is 73720974617.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68283438721 + 3364464016 = 261311^2 + 58004^2 .

It is a cyclic number.

It is not a de Polignac number, because 71647902737 - 2¹⁸ = 71647640593 is a prime.

It is a super-2 number, since 2×71647902737² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (71647902787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35823951368 + 35823951369.

It is an arithmetic number, because the mean of its divisors is an integer number (35823951369).

Almost surely, 2^71647902737 is an apocalyptic number.

It is an amenable number.

71647902737 is a deficient number, since it is larger than the sum of its proper divisors (1).

71647902737 is an equidigital number, since it uses as much as digits as its factorization.

71647902737 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3111696, while the sum is 53.

The spelling of 71647902737 in words is "seventy-one billion, six hundred forty-seven million, nine hundred two thousand, seven hundred thirty-seven".