71002881799561 has 4 divisors (see below), whose sum is σ = 71005148338432. Its totient is φ = 71000615260692.

The previous prime is 71002881799517. The next prime is 71002881799621. The reversal of 71002881799561 is 16599718820017.

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 71002881799561 - 2²⁹ = 71002344928649 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 71002881799493 and 71002881799502.

It is not an unprimeable number, because it can be changed into a prime (71002881791561) 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 3 ways as a sum of consecutive naturals, for example, 1133222445 + ... + 1133285098.

It is an arithmetic number, because the mean of its divisors is an integer number (17751287084608).

Almost surely, 2^{71002881799561} is an apocalyptic number.

It is an amenable number.

71002881799561 is a deficient number, since it is larger than the sum of its proper divisors (2266538871).

71002881799561 is a wasteful number, since it uses less digits than its factorization.

71002881799561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2266538870.

The product of its (nonzero) digits is 15240960, while the sum is 64.

The spelling of 71002881799561 in words is "seventy-one trillion, two billion, eight hundred eighty-one million, seven hundred ninety-nine thousand, five hundred sixty-one".