5456643840 has 144 divisors (see below), whose sum is σ = 19363629600. Its totient is φ = 1455095808.

The previous prime is 5456643769. The next prime is 5456643853. The reversal of 5456643840 is 483466545.

5456643840 is a `hidden beast` number, since 5 + 4 + 566 + 4 + 3 + 84 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (45).

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, 44385 + ... + 113504.

It is an arithmetic number, because the mean of its divisors is an integer number (134469650).

Almost surely, 2^5456643840 is an apocalyptic number.

It is an amenable number.

5456643840 is an abundant number, since it is smaller than the sum of its proper divisors (13906985760).

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

5456643840 is a wasteful number, since it uses less digits than its factorization.

5456643840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157919 (or 157899 counting only the distinct ones).

The product of its (nonzero) digits is 1382400, while the sum is 45.

The square root of 5456643840 is about 73869.0993582567. The cubic root of 5456643840 is about 1760.5236733710.

The spelling of 5456643840 in words is "five billion, four hundred fifty-six million, six hundred forty-three thousand, eight hundred forty".