1646356745 has 48 divisors (see below), whose sum is σ = 2290462272. Its totient is φ = 1126465920.

The previous prime is 1646356739. The next prime is 1646356759. The reversal of 1646356745 is 5476536461.

It is not a de Polignac number, because 1646356745 - 2⁴ = 1646356729 is a prime.

It is a Duffinian number.

Its product of digits (1814400) is a multiple of the sum of its prime factors (630).

It is a self number, because there is not a number n which added to its sum of digits gives 1646356745.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5618819 + ... + 5619111.

It is an arithmetic number, because the mean of its divisors is an integer number (47717964).

Almost surely, 2^1646356745 is an apocalyptic number.

It is an amenable number.

1646356745 is a deficient number, since it is larger than the sum of its proper divisors (644105527).

1646356745 is a wasteful number, since it uses less digits than its factorization.

1646356745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 630 (or 611 counting only the distinct ones).

The product of its digits is 1814400, while the sum is 47.

The square root of 1646356745 is about 40575.3218717979. The cubic root of 1646356745 is about 1180.7953904362.

The spelling of 1646356745 in words is "one billion, six hundred forty-six million, three hundred fifty-six thousand, seven hundred forty-five".