71701491321 has 24 divisors (see below), whose sum is σ = 104067105480. Its totient is φ = 47571204096.

The previous prime is 71701491283. The next prime is 71701491359. The reversal of 71701491321 is 12319410717.

71701491321 is a `hidden beast` number, since 71 + 70 + 1 + 491 + 32 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (71701491283) and next prime (71701491359).

It can be written as a sum of positive squares in 4 ways, for example, as 28135365696 + 43566125625 = 167736^2 + 208725^2 .

It is not a de Polignac number, because 71701491321 - 2¹⁰ = 71701490297 is a prime.

It is a super-2 number, since 2×71701491321² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (71701491361) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5667615 + ... + 5680251.

It is an arithmetic number, because the mean of its divisors is an integer number (4336129395).

Almost surely, 2^71701491321 is an apocalyptic number.

It is an amenable number.

71701491321 is a deficient number, since it is larger than the sum of its proper divisors (32365614159).

71701491321 is a wasteful number, since it uses less digits than its factorization.

71701491321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15625 (or 15622 counting only the distinct ones).

The product of its (nonzero) digits is 10584, while the sum is 36.

The spelling of 71701491321 in words is "seventy-one billion, seven hundred one million, four hundred ninety-one thousand, three hundred twenty-one".