1646474051 has 8 divisors (see below), whose sum is σ = 1733503680. Its totient is φ = 1559481768.

The previous prime is 1646474017. The next prime is 1646474057. The reversal of 1646474051 is 1504746461.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1646474051 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1646473996 and 1646474014.

It is not an unprimeable number, because it can be changed into a prime (1646474057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 161240 + ... + 171146.

It is an arithmetic number, because the mean of its divisors is an integer number (216687960).

Almost surely, 2^1646474051 is an apocalyptic number.

1646474051 is a deficient number, since it is larger than the sum of its proper divisors (87029629).

1646474051 is an equidigital number, since it uses as much as digits as its factorization.

1646474051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18673.

The product of its (nonzero) digits is 80640, while the sum is 38.

The square root of 1646474051 is about 40576.7673798690. The cubic root of 1646474051 is about 1180.8234343975.

The spelling of 1646474051 in words is "one billion, six hundred forty-six million, four hundred seventy-four thousand, fifty-one".