71563028251 has 8 divisors (see below), whose sum is σ = 84074047344. Its totient is φ = 60052890720.

The previous prime is 71563028227. The next prime is 71563028261. The reversal of 71563028251 is 15282036517.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 71563028251 - 2⁷ = 71563028123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71563028221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 250220236 + ... + 250220521.

It is an arithmetic number, because the mean of its divisors is an integer number (10509255918).

Almost surely, 2^71563028251 is an apocalyptic number.

71563028251 is a deficient number, since it is larger than the sum of its proper divisors (12511019093).

71563028251 is a wasteful number, since it uses less digits than its factorization.

71563028251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500440781.

The product of its (nonzero) digits is 100800, while the sum is 40.

The spelling of 71563028251 in words is "seventy-one billion, five hundred sixty-three million, twenty-eight thousand, two hundred fifty-one".