71507631401 has 2 divisors, whose sum is σ = 71507631402. Its totient is φ = 71507631400.

The previous prime is 71507631379. The next prime is 71507631409. The reversal of 71507631401 is 10413670517.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 70703341801 + 804289600 = 265901^2 + 28360^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71507631401 is a prime.

It is a super-2 number, since 2×71507631401² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (71507631409) 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, 35753815700 + 35753815701.

It is an arithmetic number, because the mean of its divisors is an integer number (35753815701).

Almost surely, 2^71507631401 is an apocalyptic number.

It is an amenable number.

71507631401 is a deficient number, since it is larger than the sum of its proper divisors (1).

71507631401 is an equidigital number, since it uses as much as digits as its factorization.

71507631401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17640, while the sum is 35.

The spelling of 71507631401 in words is "seventy-one billion, five hundred seven million, six hundred thirty-one thousand, four hundred one".