71301668921 has 32 divisors (see below), whose sum is σ = 85767821568. Its totient is φ = 57991852800.

The previous prime is 71301668899. The next prime is 71301668927. The reversal of 71301668921 is 12986610317.

It is a de Polignac number, because none of the positive numbers 2^k-71301668921 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (71301668927) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7802471 + ... + 7811603.

It is an arithmetic number, because the mean of its divisors is an integer number (2680244424).

Almost surely, 2^71301668921 is an apocalyptic number.

It is an amenable number.

71301668921 is a deficient number, since it is larger than the sum of its proper divisors (14466152647).

71301668921 is a wasteful number, since it uses less digits than its factorization.

71301668921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9921.

The product of its (nonzero) digits is 108864, while the sum is 44.

The spelling of 71301668921 in words is "seventy-one billion, three hundred one million, six hundred sixty-eight thousand, nine hundred twenty-one".