4520397538945 has 16 divisors (see below), whose sum is σ = 5941617863760. Its totient is φ = 3286228148224.

The previous prime is 4520397538931. The next prime is 4520397538949. The reversal of 4520397538945 is 5498357930254.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 396935280784 + 4123462258161 = 630028^2 + 2030631^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4520397538945 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4520397538949) 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 15 ways as a sum of consecutive naturals, for example, 916913872 + ... + 916918801.

It is an arithmetic number, because the mean of its divisors is an integer number (371351116485).

Almost surely, 2^{4520397538945} is an apocalyptic number.

It is an amenable number.

4520397538945 is a deficient number, since it is larger than the sum of its proper divisors (1421220324815).

4520397538945 is a wasteful number, since it uses less digits than its factorization.

4520397538945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1833832724.

The product of its (nonzero) digits is 163296000, while the sum is 64.

The spelling of 4520397538945 in words is "four trillion, five hundred twenty billion, three hundred ninety-seven million, five hundred thirty-eight thousand, nine hundred forty-five".