454545640 has 24 divisors (see below), whose sum is σ = 1023031170. Its totient is φ = 181764320.

The previous prime is 454545631. The next prime is 454545661. The reversal of 454545640 is 46545454.

It can be written as a sum of positive squares in only one way, i.e., 409091076 + 45454564 = 20226^2 + 6742^2 .

It is a super-2 number, since 2×454545640² = 413223477686019200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 454545640.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 133155 + ... + 136525.

Almost surely, 2^454545640 is an apocalyptic number.

454545640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

454545640 is an abundant number, since it is smaller than the sum of its proper divisors (568485530).

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

454545640 is an frugal number, since it uses more digits than its factorization.

454545640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6753 (or 3378 counting only the distinct ones).

The product of its (nonzero) digits is 192000, while the sum is 37.

The square root of 454545640 is about 21320.0759848552. The cubic root of 454545640 is about 768.8810643964.

The spelling of 454545640 in words is "four hundred fifty-four million, five hundred forty-five thousand, six hundred forty".