7287991345 has 16 divisors (see below), whose sum is σ = 9141995520. Its totient is φ = 5570884800.

The previous prime is 7287991331. The next prime is 7287991411. The reversal of 7287991345 is 5431997827.

It is a happy number.

It is not a de Polignac number, because 7287991345 - 2¹⁷ = 7287860273 is a prime.

It is a super-2 number, since 2×7287991345² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 285346 + ... + 309835.

It is an arithmetic number, because the mean of its divisors is an integer number (571374720).

Almost surely, 2^7287991345 is an apocalyptic number.

It is an amenable number.

7287991345 is a deficient number, since it is larger than the sum of its proper divisors (1854004175).

7287991345 is a wasteful number, since it uses less digits than its factorization.

7287991345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 595296.

The product of its digits is 3810240, while the sum is 55.

The square root of 7287991345 is about 85369.7331903995. The cubic root of 7287991345 is about 1938.8131175910.

The spelling of 7287991345 in words is "seven billion, two hundred eighty-seven million, nine hundred ninety-one thousand, three hundred forty-five".