71304666862561 has 4 divisors (see below), whose sum is σ = 77786909304624. Its totient is φ = 64822424420500.

The previous prime is 71304666862547. The next prime is 71304666862589. The reversal of 71304666862561 is 16526866640317.

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 71304666862561 - 2⁷ = 71304666862433 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 71304666862561.

It is not an unprimeable number, because it can be changed into a prime (71304666862531) 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, 3241121221015 + ... + 3241121221036.

It is an arithmetic number, because the mean of its divisors is an integer number (19446727326156).

Almost surely, 2^{71304666862561} is an apocalyptic number.

It is an amenable number.

71304666862561 is a deficient number, since it is larger than the sum of its proper divisors (6482242442063).

71304666862561 is a wasteful number, since it uses less digits than its factorization.

71304666862561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6482242442062.

The product of its (nonzero) digits is 52254720, while the sum is 61.

The spelling of 71304666862561 in words is "seventy-one trillion, three hundred four billion, six hundred sixty-six million, eight hundred sixty-two thousand, five hundred sixty-one".