1646245445 has 16 divisors (see below), whose sum is σ = 2132428032. Its totient is φ = 1212847680.

The previous prime is 1646245427. The next prime is 1646245451. The reversal of 1646245445 is 5445426461.

It is not a de Polignac number, because 1646245445 - 2³⁰ = 572503621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1367 + ... + 57396.

It is an arithmetic number, because the mean of its divisors is an integer number (133276752).

Almost surely, 2^1646245445 is an apocalyptic number.

It is an amenable number.

1646245445 is a deficient number, since it is larger than the sum of its proper divisors (486182587).

1646245445 is a wasteful number, since it uses less digits than its factorization.

1646245445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59212.

The product of its digits is 460800, while the sum is 41.

The square root of 1646245445 is about 40573.9503253011. The cubic root of 1646245445 is about 1180.7687810781.

The spelling of 1646245445 in words is "one billion, six hundred forty-six million, two hundred forty-five thousand, four hundred forty-five".