1645408463 has 8 divisors (see below), whose sum is σ = 1694108400. Its totient is φ = 1596931200.

The previous prime is 1645408451. The next prime is 1645408489. The reversal of 1645408463 is 3648045461.

It is a happy number.

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 1645408463 - 2⁴ = 1645408447 is a prime.

It is a super-2 number, since 2×1645408463² = 5414738020224044738, which contains 22 as substring.

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 1645408463.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1645408403) 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, 40613 + ... + 70286.

It is an arithmetic number, because the mean of its divisors is an integer number (211763550).

Almost surely, 2^1645408463 is an apocalyptic number.

1645408463 is a deficient number, since it is larger than the sum of its proper divisors (48699937).

1645408463 is a wasteful number, since it uses less digits than its factorization.

1645408463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111337.

The product of its (nonzero) digits is 276480, while the sum is 41.

The square root of 1645408463 is about 40563.6347360539. The cubic root of 1645408463 is about 1180.5686388386.

The spelling of 1645408463 in words is "one billion, six hundred forty-five million, four hundred eight thousand, four hundred sixty-three".