71181522061 has 8 divisors (see below), whose sum is σ = 79129831424. Its totient is φ = 63586470960.

The previous prime is 71181522029. The next prime is 71181522073. The reversal of 71181522061 is 16022518117.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 71181522061 - 2⁵ = 71181522029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71181522091) 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 7 ways as a sum of consecutive naturals, for example, 88314141 + ... + 88314946.

It is an arithmetic number, because the mean of its divisors is an integer number (9891228928).

Almost surely, 2^71181522061 is an apocalyptic number.

It is an amenable number.

71181522061 is a deficient number, since it is larger than the sum of its proper divisors (7948309363).

71181522061 is a wasteful number, since it uses less digits than its factorization.

71181522061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176629131.

The product of its (nonzero) digits is 6720, while the sum is 34.

The spelling of 71181522061 in words is "seventy-one billion, one hundred eighty-one million, five hundred twenty-two thousand, sixty-one".