4520397538949 has 2 divisors, whose sum is σ = 4520397538950. Its totient is φ = 4520397538948.

The previous prime is 4520397538931. The next prime is 4520397538961. The reversal of 4520397538949 is 9498357930254.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4511588402500 + 8809136449 = 2124050^2 + 93857^2 .

It is a cyclic number.

It is not a de Polignac number, because 4520397538949 - 2²⁰ = 4520396490373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4520397538549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2260198769474 + 2260198769475.

It is an arithmetic number, because the mean of its divisors is an integer number (2260198769475).

Almost surely, 2^{4520397538949} is an apocalyptic number.

It is an amenable number.

4520397538949 is a deficient number, since it is larger than the sum of its proper divisors (1).

4520397538949 is an equidigital number, since it uses as much as digits as its factorization.

4520397538949 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 293932800, while the sum is 68.

The spelling of 4520397538949 in words is "four trillion, five hundred twenty billion, three hundred ninety-seven million, five hundred thirty-eight thousand, nine hundred forty-nine".