71550771233 has 4 divisors (see below), whose sum is σ = 71631803568. Its totient is φ = 71469738900.

The previous prime is 71550771221. The next prime is 71550771263. The reversal of 71550771233 is 33217705517.

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, and also an emirpimes, since its reverse is a distinct semiprime: 33217705517 = 15161 ⋅2190997.

It is a cyclic number.

It is not a de Polignac number, because 71550771233 - 2¹⁸ = 71550509089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71550771263) 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, 40514843 + ... + 40516608.

It is an arithmetic number, because the mean of its divisors is an integer number (17907950892).

Almost surely, 2^71550771233 is an apocalyptic number.

It is an amenable number.

71550771233 is a deficient number, since it is larger than the sum of its proper divisors (81032335).

71550771233 is an equidigital number, since it uses as much as digits as its factorization.

71550771233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81032334.

The product of its (nonzero) digits is 154350, while the sum is 41.

The spelling of 71550771233 in words is "seventy-one billion, five hundred fifty million, seven hundred seventy-one thousand, two hundred thirty-three".