71211654645 has 16 divisors (see below), whose sum is σ = 114256033920. Its totient is φ = 37873753664.

The previous prime is 71211654641. The next prime is 71211654649. The reversal of 71211654645 is 54645611217.

It is an interprime number because it is at equal distance from previous prime (71211654641) and next prime (71211654649).

It is a cyclic number.

It is not a de Polignac number, because 71211654645 - 2² = 71211654641 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 71211654597 and 71211654606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71211654641) 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, 6606654 + ... + 6617423.

It is an arithmetic number, because the mean of its divisors is an integer number (7141002120).

Almost surely, 2^71211654645 is an apocalyptic number.

It is an amenable number.

71211654645 is a deficient number, since it is larger than the sum of its proper divisors (43044379275).

71211654645 is a wasteful number, since it uses less digits than its factorization.

71211654645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13224444.

The product of its digits is 201600, while the sum is 42.

The spelling of 71211654645 in words is "seventy-one billion, two hundred eleven million, six hundred fifty-four thousand, six hundred forty-five".