1646747913 has 8 divisors (see below), whose sum is σ = 2212953088. Its totient is φ = 1089187344.

The previous prime is 1646747899. The next prime is 1646747923. The reversal of 1646747913 is 3197476461.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1646747913 - 2⁵ = 1646747881 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1646747923) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2160706 + ... + 2161467.

It is an arithmetic number, because the mean of its divisors is an integer number (276619136).

Almost surely, 2^1646747913 is an apocalyptic number.

It is an amenable number.

1646747913 is a deficient number, since it is larger than the sum of its proper divisors (566205175).

1646747913 is a wasteful number, since it uses less digits than its factorization.

1646747913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4322303.

The product of its digits is 762048, while the sum is 48.

The square root of 1646747913 is about 40580.1418553459. The cubic root of 1646747913 is about 1180.8889005045. Note that the first 3 decimals are identical.

The spelling of 1646747913 in words is "one billion, six hundred forty-six million, seven hundred forty-seven thousand, nine hundred thirteen".