716161681 has 4 divisors (see below), whose sum is σ = 716224000. Its totient is φ = 716099364.

The previous prime is 716161657. The next prime is 716161687. The reversal of 716161681 is 186161617.

716161681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 716161681 - 2¹³ = 716153489 is a prime.

It is a super-2 number, since 2×716161681² = 1025775106665491522, which contains 22 as substring.

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 716161681.

It is not an unprimeable number, because it can be changed into a prime (716161687) 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, 8361 + ... + 38758.

It is an arithmetic number, because the mean of its divisors is an integer number (179056000).

Almost surely, 2^716161681 is an apocalyptic number.

It is an amenable number.

716161681 is a deficient number, since it is larger than the sum of its proper divisors (62319).

716161681 is a wasteful number, since it uses less digits than its factorization.

716161681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62318.

The product of its digits is 12096, while the sum is 37.

The square root of 716161681 is about 26761.1973013167. The cubic root of 716161681 is about 894.6854198565.

The spelling of 716161681 in words is "seven hundred sixteen million, one hundred sixty-one thousand, six hundred eighty-one".