71406623659531 has 2 divisors, whose sum is σ = 71406623659532. Its totient is φ = 71406623659530.

The previous prime is 71406623659529. The next prime is 71406623659583. The reversal of 71406623659531 is 13595632660417.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 71406623659531 - 2¹ = 71406623659529 is a prime.

It is a super-2 number, since 2×71406623659531² (a number of 29 digits) contains 22 as substring.

Together with 71406623659529, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (71406623656531) 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, 35703311829765 + 35703311829766.

It is an arithmetic number, because the mean of its divisors is an integer number (35703311829766).

Almost surely, 2^{71406623659531} is an apocalyptic number.

71406623659531 is a deficient number, since it is larger than the sum of its proper divisors (1).

71406623659531 is an equidigital number, since it uses as much as digits as its factorization.

71406623659531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24494400, while the sum is 58.

The spelling of 71406623659531 in words is "seventy-one trillion, four hundred six billion, six hundred twenty-three million, six hundred fifty-nine thousand, five hundred thirty-one".