71221620633 has 4 divisors (see below), whose sum is σ = 94962160848. Its totient is φ = 47481080420.

The previous prime is 71221620619. The next prime is 71221620697. The reversal of 71221620633 is 33602612217.

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: 33602612217 = 3 ⋅11200870739.

It is a cyclic number.

It is not a de Polignac number, because 71221620633 - 2⁵ = 71221620601 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 71221620594 and 71221620603.

It is not an unprimeable number, because it can be changed into a prime (71221620433) 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, 11870270103 + ... + 11870270108.

It is an arithmetic number, because the mean of its divisors is an integer number (23740540212).

Almost surely, 2^71221620633 is an apocalyptic number.

It is an amenable number.

71221620633 is a deficient number, since it is larger than the sum of its proper divisors (23740540215).

71221620633 is a wasteful number, since it uses less digits than its factorization.

71221620633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23740540214.

The product of its (nonzero) digits is 18144, while the sum is 33.

The spelling of 71221620633 in words is "seventy-one billion, two hundred twenty-one million, six hundred twenty thousand, six hundred thirty-three".