1445680845 has 64 divisors (see below), whose sum is σ = 2970432000. Its totient is φ = 653419008.

The previous prime is 1445680813. The next prime is 1445680861. The reversal of 1445680845 is 5480865441.

It is a happy number.

1445680845 is a `hidden beast` number, since 1 + 4 + 4 + 568 + 0 + 84 + 5 = 666.

It is not a de Polignac number, because 1445680845 - 2⁵ = 1445680813 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1445680845.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 75511 + ... + 92699.

It is an arithmetic number, because the mean of its divisors is an integer number (46413000).

Almost surely, 2^1445680845 is an apocalyptic number.

1445680845 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1445680845 is an abundant number, since it is smaller than the sum of its proper divisors (1524751155).

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

1445680845 is a wasteful number, since it uses less digits than its factorization.

1445680845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17299 (or 17293 counting only the distinct ones).

The product of its (nonzero) digits is 614400, while the sum is 45.

The square root of 1445680845 is about 38022.1099493439. The cubic root of 1445680845 is about 1130.7262527958.

The spelling of 1445680845 in words is "one billion, four hundred forty-five million, six hundred eighty thousand, eight hundred forty-five".