7261151761 has 4 divisors (see below), whose sum is σ = 7272137524. Its totient is φ = 7250166000.

The previous prime is 7261151759. The next prime is 7261151767. The reversal of 7261151761 is 1671511627.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4970955025 + 2290196736 = 70505^2 + 47856^2 .

It is a cyclic number.

It is not a de Polignac number, because 7261151761 - 2¹ = 7261151759 is a prime.

It is a super-2 number, since 2×7261151761² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7261151761.

It is not an unprimeable number, because it can be changed into a prime (7261151767) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5491890 + ... + 5493211.

It is an arithmetic number, because the mean of its divisors is an integer number (1818034381).

Almost surely, 2^7261151761 is an apocalyptic number.

It is an amenable number.

7261151761 is a deficient number, since it is larger than the sum of its proper divisors (10985763).

7261151761 is a wasteful number, since it uses less digits than its factorization.

7261151761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10985762.

The product of its digits is 17640, while the sum is 37.

The square root of 7261151761 is about 85212.3920624225. The cubic root of 7261151761 is about 1936.4301588707.

The spelling of 7261151761 in words is "seven billion, two hundred sixty-one million, one hundred fifty-one thousand, seven hundred sixty-one".