7345576721 has 12 divisors (see below), whose sum is σ = 8839506420. Its totient is φ = 6079096800.

The previous prime is 7345576703. The next prime is 7345576727. The reversal of 7345576721 is 1276755437.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 4768593025 + 2576983696 = 69055^2 + 50764^2 .

It is not a de Polignac number, because 7345576721 - 2¹⁴ = 7345560337 is a prime.

It is a super-2 number, since 2×7345576721² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7345576727) 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 in 11 ways as a sum of consecutive naturals, for example, 2583230 + ... + 2586071.

It is an arithmetic number, because the mean of its divisors is an integer number (736625535).

Almost surely, 2^7345576721 is an apocalyptic number.

It is an amenable number.

7345576721 is a deficient number, since it is larger than the sum of its proper divisors (1493929699).

7345576721 is a wasteful number, since it uses less digits than its factorization.

7345576721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5169344 (or 5169337 counting only the distinct ones).

The product of its digits is 1234800, while the sum is 47.

The square root of 7345576721 is about 85706.3400280283. The cubic root of 7345576721 is about 1943.9061765849.

The spelling of 7345576721 in words is "seven billion, three hundred forty-five million, five hundred seventy-six thousand, seven hundred twenty-one".