71647620231 has 16 divisors (see below), whose sum is σ = 104230321920. Its totient is φ = 43416299520.

The previous prime is 71647620227. The next prime is 71647620251. The reversal of 71647620231 is 13202674617.

It is not a de Polignac number, because 71647620231 - 2² = 71647620227 is a prime.

It is a super-2 number, since 2×71647620231² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 71647620231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71647620251) 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 in 15 ways as a sum of consecutive naturals, for example, 66055 + ... + 384263.

It is an arithmetic number, because the mean of its divisors is an integer number (6514395120).

Almost surely, 2^71647620231 is an apocalyptic number.

71647620231 is a deficient number, since it is larger than the sum of its proper divisors (32582701689).

71647620231 is a wasteful number, since it uses less digits than its factorization.

71647620231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325046.

The product of its (nonzero) digits is 84672, while the sum is 39.

The spelling of 71647620231 in words is "seventy-one billion, six hundred forty-seven million, six hundred twenty thousand, two hundred thirty-one".