71446947221 has 8 divisors (see below), whose sum is σ = 77111237784. Its totient is φ = 65806709760.

The previous prime is 71446947203. The next prime is 71446947233. The reversal of 71446947221 is 12274964417.

It can be written as a sum of positive squares in 4 ways, for example, as 16274104900 + 55172842321 = 127570^2 + 234889^2 .

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 71446947221 - 2¹⁴ = 71446930837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71446977221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6007100 + ... + 6018981.

It is an arithmetic number, because the mean of its divisors is an integer number (9638904723).

Almost surely, 2^71446947221 is an apocalyptic number.

It is an amenable number.

71446947221 is a deficient number, since it is larger than the sum of its proper divisors (5664290563).

71446947221 is a wasteful number, since it uses less digits than its factorization.

71446947221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12026551.

The product of its digits is 677376, while the sum is 47.

The spelling of 71446947221 in words is "seventy-one billion, four hundred forty-six million, nine hundred forty-seven thousand, two hundred twenty-one".