7845775481 has 2 divisors, whose sum is σ = 7845775482. Its totient is φ = 7845775480.

The previous prime is 7845775459. The next prime is 7845775493. The reversal of 7845775481 is 1845775487.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7635264400 + 210511081 = 87380^2 + 14509^2 .

It is a cyclic number.

It is not a de Polignac number, because 7845775481 - 2¹⁰ = 7845774457 is a prime.

It is a super-2 number, since 2×7845775481² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7845775981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3922887740 + 3922887741.

It is an arithmetic number, because the mean of its divisors is an integer number (3922887741).

Almost surely, 2^7845775481 is an apocalyptic number.

It is an amenable number.

7845775481 is a deficient number, since it is larger than the sum of its proper divisors (1).

7845775481 is an equidigital number, since it uses as much as digits as its factorization.

7845775481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8780800, while the sum is 56.

The square root of 7845775481 is about 88576.3821850949. The cubic root of 7845775481 is about 1987.0644731960.

The spelling of 7845775481 in words is "seven billion, eight hundred forty-five million, seven hundred seventy-five thousand, four hundred eighty-one".