1451745640 has 16 divisors (see below), whose sum is σ = 3266427780. Its totient is φ = 580698240.

The previous prime is 1451745637. The next prime is 1451745679. The reversal of 1451745640 is 465471541.

It can be written as a sum of positive squares in 2 ways, for example, as 1448411364 + 3334276 = 38058^2 + 1826^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1451745640.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18146781 + ... + 18146860.

Almost surely, 2^1451745640 is an apocalyptic number.

1451745640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1451745640 is an abundant number, since it is smaller than the sum of its proper divisors (1814682140).

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

1451745640 is a wasteful number, since it uses less digits than its factorization.

1451745640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36293652 (or 36293648 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 37.

The square root of 1451745640 is about 38101.7800109129. The cubic root of 1451745640 is about 1132.3052217947.

The spelling of 1451745640 in words is "one billion, four hundred fifty-one million, seven hundred forty-five thousand, six hundred forty".