71894603633 has 4 divisors (see below), whose sum is σ = 75678530160. Its totient is φ = 68110677108.

The previous prime is 71894603629. The next prime is 71894603639. The reversal of 71894603633 is 33630649817.

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 71894603633 - 2² = 71894603629 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71894603639) 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 3 ways as a sum of consecutive naturals, for example, 1891963235 + ... + 1891963272.

It is an arithmetic number, because the mean of its divisors is an integer number (18919632540).

Almost surely, 2^71894603633 is an apocalyptic number.

It is an amenable number.

71894603633 is a deficient number, since it is larger than the sum of its proper divisors (3783926527).

71894603633 is a wasteful number, since it uses less digits than its factorization.

71894603633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3783926526.

The product of its (nonzero) digits is 1959552, while the sum is 50.

The spelling of 71894603633 in words is "seventy-one billion, eight hundred ninety-four million, six hundred three thousand, six hundred thirty-three".