5405646820 has 24 divisors (see below), whose sum is σ = 12973552704. Its totient is φ = 1853364576.

The previous prime is 5405646797. The next prime is 5405646823. The reversal of 5405646820 is 286465045.

It is a super-2 number, since 2×5405646820² = 58442035085152224800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (5405646823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19305742 + ... + 19306021.

It is an arithmetic number, because the mean of its divisors is an integer number (540564696).

Almost surely, 2^5405646820 is an apocalyptic number.

It is an amenable number.

5405646820 is an abundant number, since it is smaller than the sum of its proper divisors (7567905884).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

5405646820 is a wasteful number, since it uses less digits than its factorization.

5405646820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38611779 (or 38611777 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 40.

The square root of 5405646820 is about 73523.1039877942. The cubic root of 5405646820 is about 1755.0219632914.

The spelling of 5405646820 in words is "five billion, four hundred five million, six hundred forty-six thousand, eight hundred twenty".