1320377545 has 32 divisors (see below), whose sum is σ = 1694309760. Its totient is φ = 984960000.

The previous prime is 1320377477. The next prime is 1320377549. The reversal of 1320377545 is 5457730231.

It is not a de Polignac number, because 1320377545 - 2⁷ = 1320377417 is a prime.

It is a super-2 number, since 2×1320377545² = 3486793722680454050, which contains 22 as substring.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (1320377549) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 2312110 + ... + 2312680.

It is an arithmetic number, because the mean of its divisors is an integer number (52947180).

Almost surely, 2^1320377545 is an apocalyptic number.

It is an amenable number.

1320377545 is a deficient number, since it is larger than the sum of its proper divisors (373932215).

1320377545 is a wasteful number, since it uses less digits than its factorization.

1320377545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 937.

The product of its (nonzero) digits is 88200, while the sum is 37.

The square root of 1320377545 is about 36336.9996697581. Note that the first 3 decimals coincide. The cubic root of 1320377545 is about 1097.0658844206.

The spelling of 1320377545 in words is "one billion, three hundred twenty million, three hundred seventy-seven thousand, five hundred forty-five".