71161442533 has 4 divisors (see below), whose sum is σ = 71219629728. Its totient is φ = 71103255340.

The previous prime is 71161442497. The next prime is 71161442593. The reversal of 71161442533 is 33524416117.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 71161442533 - 2¹³ = 71161434341 is a prime.

It is a super-2 number, since 2×71161442533² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 71161442492 and 71161442501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71161442593) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29091763 + ... + 29094208.

It is an arithmetic number, because the mean of its divisors is an integer number (17804907432).

Almost surely, 2^71161442533 is an apocalyptic number.

It is an amenable number.

71161442533 is a deficient number, since it is larger than the sum of its proper divisors (58187195).

71161442533 is a wasteful number, since it uses less digits than its factorization.

71161442533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58187194.

The product of its digits is 60480, while the sum is 37.

The spelling of 71161442533 in words is "seventy-one billion, one hundred sixty-one million, four hundred forty-two thousand, five hundred thirty-three".