1646162641 has 8 divisors (see below), whose sum is σ = 1792555200. Its totient is φ = 1505745360.

The previous prime is 1646162633. The next prime is 1646162657. The reversal of 1646162641 is 1462616461.

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

It is a cyclic number.

It is not a de Polignac number, because 1646162641 - 2³ = 1646162633 is a prime.

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 1646162641.

It is not an unprimeable number, because it can be changed into a prime (1646162611) 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, 1493245 + ... + 1494346.

It is an arithmetic number, because the mean of its divisors is an integer number (224069400).

Almost surely, 2^1646162641 is an apocalyptic number.

It is an amenable number.

1646162641 is a deficient number, since it is larger than the sum of its proper divisors (146392559).

1646162641 is a wasteful number, since it uses less digits than its factorization.

1646162641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2987639.

The product of its digits is 41472, while the sum is 37.

The square root of 1646162641 is about 40572.9299040629. The cubic root of 1646162641 is about 1180.7489837027.

The spelling of 1646162641 in words is "one billion, six hundred forty-six million, one hundred sixty-two thousand, six hundred forty-one".