716486321081 has 4 divisors (see below), whose sum is σ = 716488014564. Its totient is φ = 716484627600.

The previous prime is 716486321063. The next prime is 716486321093. The reversal of 716486321081 is 180123684617.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 546069271225 + 170417049856 = 738965^2 + 412816^2 .

It is a cyclic number.

It is not a de Polignac number, because 716486321081 - 2²² = 716482126777 is a prime.

It is a super-2 number, since 2×716486321081² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (716486321021) 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, 390371 + ... + 1259111.

It is an arithmetic number, because the mean of its divisors is an integer number (179122003641).

Almost surely, 2^716486321081 is an apocalyptic number.

It is an amenable number.

716486321081 is a deficient number, since it is larger than the sum of its proper divisors (1693483).

716486321081 is an equidigital number, since it uses as much as digits as its factorization.

716486321081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1693482.

The product of its (nonzero) digits is 387072, while the sum is 47.

The spelling of 716486321081 in words is "seven hundred sixteen billion, four hundred eighty-six million, three hundred twenty-one thousand, eighty-one".