71286980537 has 2 divisors, whose sum is σ = 71286980538. Its totient is φ = 71286980536.

The previous prime is 71286980533. The next prime is 71286980561. The reversal of 71286980537 is 73508968217.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69514486336 + 1772494201 = 263656^2 + 42101^2 .

It is a cyclic number.

It is not a de Polignac number, because 71286980537 - 2² = 71286980533 is a prime.

It is not a weakly prime, because it can be changed into another prime (71286980533) 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, 35643490268 + 35643490269.

It is an arithmetic number, because the mean of its divisors is an integer number (35643490269).

Almost surely, 2^71286980537 is an apocalyptic number.

It is an amenable number.

71286980537 is a deficient number, since it is larger than the sum of its proper divisors (1).

71286980537 is an equidigital number, since it uses as much as digits as its factorization.

71286980537 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5080320, while the sum is 56.

The spelling of 71286980537 in words is "seventy-one billion, two hundred eighty-six million, nine hundred eighty thousand, five hundred thirty-seven".