7495519681 has 8 divisors (see below), whose sum is σ = 8290263464. Its totient is φ = 6731942400.

The previous prime is 7495519663. The next prime is 7495519697. The reversal of 7495519681 is 1869155947.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2167833600 + 5327686081 = 46560^2 + 72991^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7495519681 - 2⁹ = 7495519169 is a prime.

It is a super-2 number, since 2×7495519681² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7495519621) 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 7 ways as a sum of consecutive naturals, for example, 7791120 + ... + 7792081.

It is an arithmetic number, because the mean of its divisors is an integer number (1036282933).

Almost surely, 2^7495519681 is an apocalyptic number.

It is an amenable number.

7495519681 is a deficient number, since it is larger than the sum of its proper divisors (794743783).

7495519681 is a wasteful number, since it uses less digits than its factorization.

7495519681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15583251.

The product of its digits is 2721600, while the sum is 55.

The square root of 7495519681 is about 86576.6693803821. The cubic root of 7495519681 is about 1957.0439683697.

The spelling of 7495519681 in words is "seven billion, four hundred ninety-five million, five hundred nineteen thousand, six hundred eighty-one".