7449581761 has 2 divisors, whose sum is σ = 7449581762. Its totient is φ = 7449581760.

The previous prime is 7449581719. The next prime is 7449581773. The reversal of 7449581761 is 1671859447.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7249500736 + 200081025 = 85144^2 + 14145^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7449581761 is a prime.

It is a super-2 number, since 2×7449581761² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 7449581699 and 7449581708.

It is not a weakly prime, because it can be changed into another prime (7449581701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3724790880 + 3724790881.

It is an arithmetic number, because the mean of its divisors is an integer number (3724790881).

Almost surely, 2^7449581761 is an apocalyptic number.

It is an amenable number.

7449581761 is a deficient number, since it is larger than the sum of its proper divisors (1).

7449581761 is an equidigital number, since it uses as much as digits as its factorization.

7449581761 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1693440, while the sum is 52.

The square root of 7449581761 is about 86310.9596806802. The cubic root of 7449581761 is about 1953.0377164846.

The spelling of 7449581761 in words is "seven billion, four hundred forty-nine million, five hundred eighty-one thousand, seven hundred sixty-one".