1631716705 has 4 divisors (see below), whose sum is σ = 1958060052. Its totient is φ = 1305373360.

The previous prime is 1631716703. The next prime is 1631716733. The reversal of 1631716705 is 5076171361.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5076171361 = 35923 ⋅141307.

It can be written as a sum of positive squares in 2 ways, for example, as 315986176 + 1315730529 = 17776^2 + 36273^2 .

It is not a de Polignac number, because 1631716705 - 2¹ = 1631716703 is a prime.

It is a super-3 number, since 3×1631716705³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1631716703) 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, 163171666 + ... + 163171675.

It is an arithmetic number, because the mean of its divisors is an integer number (489515013).

Almost surely, 2^1631716705 is an apocalyptic number.

It is an amenable number.

1631716705 is a deficient number, since it is larger than the sum of its proper divisors (326343347).

1631716705 is an equidigital number, since it uses as much as digits as its factorization.

1631716705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326343346.

The product of its (nonzero) digits is 26460, while the sum is 37.

The square root of 1631716705 is about 40394.5133031703. The cubic root of 1631716705 is about 1177.2849347947.

The spelling of 1631716705 in words is "one billion, six hundred thirty-one million, seven hundred sixteen thousand, seven hundred five".