451265640 has 64 divisors (see below), whose sum is σ = 1547199360. Its totient is φ = 103146240.

The previous prime is 451265627. The next prime is 451265641. The reversal of 451265640 is 46562154.

It is not an unprimeable number, because it can be changed into a prime (451265641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 267771 + ... + 269450.

It is an arithmetic number, because the mean of its divisors is an integer number (24174990).

Almost surely, 2^451265640 is an apocalyptic number.

451265640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

451265640 is an abundant number, since it is smaller than the sum of its proper divisors (1095933720).

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

451265640 is a wasteful number, since it uses less digits than its factorization.

451265640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 537242 (or 537238 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 33.

The square root of 451265640 is about 21243.0139104601. The cubic root of 451265640 is about 767.0271835213.

The spelling of 451265640 in words is "four hundred fifty-one million, two hundred sixty-five thousand, six hundred forty".