7545115481 has 2 divisors, whose sum is σ = 7545115482. Its totient is φ = 7545115480.

The previous prime is 7545115439. The next prime is 7545115483. The reversal of 7545115481 is 1845115457.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6816979225 + 728136256 = 82565^2 + 26984^2 .

It is an emirp because it is prime and its reverse (1845115457) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7545115481 - 2¹⁰ = 7545114457 is a prime.

It is a super-2 number, since 2×7545115481² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

Together with 7545115483, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (7545115483) 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 as a sum of consecutive naturals, namely, 3772557740 + 3772557741.

It is an arithmetic number, because the mean of its divisors is an integer number (3772557741).

Almost surely, 2^7545115481 is an apocalyptic number.

It is an amenable number.

7545115481 is a deficient number, since it is larger than the sum of its proper divisors (1).

7545115481 is an equidigital number, since it uses as much as digits as its factorization.

7545115481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 112000, while the sum is 41.

The square root of 7545115481 is about 86862.6241890032. The cubic root of 7545115481 is about 1961.3508909556.

The spelling of 7545115481 in words is "seven billion, five hundred forty-five million, one hundred fifteen thousand, four hundred eighty-one".