71494887847 has 2 divisors, whose sum is σ = 71494887848. Its totient is φ = 71494887846.

The previous prime is 71494887773. The next prime is 71494887857. The reversal of 71494887847 is 74878849417.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 71494887847 - 2⁷ = 71494887719 is a prime.

It is a super-2 number, since 2×71494887847² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71494887857) 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, 35747443923 + 35747443924.

It is an arithmetic number, because the mean of its divisors is an integer number (35747443924).

Almost surely, 2^71494887847 is an apocalyptic number.

71494887847 is a deficient number, since it is larger than the sum of its proper divisors (1).

71494887847 is an equidigital number, since it uses as much as digits as its factorization.

71494887847 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 101154816, while the sum is 67.

The spelling of 71494887847 in words is "seventy-one billion, four hundred ninety-four million, eight hundred eighty-seven thousand, eight hundred forty-seven".