1645415748 has 48 divisors (see below), whose sum is σ = 4329581760. Its totient is φ = 540283392.

The previous prime is 1645415747. The next prime is 1645415749. The reversal of 1645415748 is 8475145461.

1645415748 is a `hidden beast` number, since 1 + 6 + 454 + 157 + 48 = 666.

It is an interprime number because it is at equal distance from previous prime (1645415747) and next prime (1645415749).

It is not an unprimeable number, because it can be changed into a prime (1645415747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 106461 + ... + 120932.

It is an arithmetic number, because the mean of its divisors is an integer number (90199620).

Almost surely, 2^1645415748 is an apocalyptic number.

1645415748 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1645415748 is an abundant number, since it is smaller than the sum of its proper divisors (2684166012).

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

1645415748 is a wasteful number, since it uses less digits than its factorization.

1645415748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227473 (or 227465 counting only the distinct ones).

The product of its digits is 537600, while the sum is 45.

The square root of 1645415748 is about 40563.7245331343. The cubic root of 1645415748 is about 1180.5703811476.

The spelling of 1645415748 in words is "one billion, six hundred forty-five million, four hundred fifteen thousand, seven hundred forty-eight".