656220954 has 16 divisors (see below), whose sum is σ = 1314175680. Its totient is φ = 218451360.

The previous prime is 656220953. The next prime is 656220959. The reversal of 656220954 is 459022656.

It is not an unprimeable number, because it can be changed into a prime (656220953) 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, 67294 + ... + 76425.

It is an arithmetic number, because the mean of its divisors is an integer number (82135980).

Almost surely, 2^656220954 is an apocalyptic number.

656220954 is an abundant number, since it is smaller than the sum of its proper divisors (657954726).

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

656220954 is a wasteful number, since it uses less digits than its factorization.

656220954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144485.

The product of its (nonzero) digits is 129600, while the sum is 39.

The square root of 656220954 is about 25616.8099887554. The cubic root of 656220954 is about 868.9938401220.

The spelling of 656220954 in words is "six hundred fifty-six million, two hundred twenty thousand, nine hundred fifty-four".