71536546123 has 16 divisors (see below), whose sum is σ = 82041154560. Its totient is φ = 61103471616.

The previous prime is 71536546121. The next prime is 71536546127. The reversal of 71536546123 is 32164563517.

It is a cyclic number.

It is not a de Polignac number, because 71536546123 - 2¹ = 71536546121 is a prime.

It is a super-2 number, since 2×71536546123² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 71536546123.

It is not an unprimeable number, because it can be changed into a prime (71536546121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3609840 + ... + 3629602.

It is an arithmetic number, because the mean of its divisors is an integer number (5127572160).

Almost surely, 2^71536546123 is an apocalyptic number.

71536546123 is a deficient number, since it is larger than the sum of its proper divisors (10504608437).

71536546123 is a wasteful number, since it uses less digits than its factorization.

71536546123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21546.

The product of its digits is 453600, while the sum is 43.

The spelling of 71536546123 in words is "seventy-one billion, five hundred thirty-six million, five hundred forty-six thousand, one hundred twenty-three".