656543454 has 48 divisors (see below), whose sum is σ = 1529629200. Its totient is φ = 187318656.

The previous prime is 656543453. The next prime is 656543467. The reversal of 656543454 is 454345656.

656543454 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

656543454 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656543453) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 313242 + ... + 315330.

It is an arithmetic number, because the mean of its divisors is an integer number (31867275).

Almost surely, 2^656543454 is an apocalyptic number.

656543454 is an abundant number, since it is smaller than the sum of its proper divisors (873085746).

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

656543454 is a wasteful number, since it uses less digits than its factorization.

656543454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3177 (or 3170 counting only the distinct ones).

The product of its digits is 864000, while the sum is 42.

The square root of 656543454 is about 25623.1039103384. The cubic root of 656543454 is about 869.1361725760.

The spelling of 656543454 in words is "six hundred fifty-six million, five hundred forty-three thousand, four hundred fifty-four".