7526428649 has 4 divisors (see below), whose sum is σ = 7969159764. Its totient is φ = 7083697536.

The previous prime is 7526428643. The next prime is 7526428687. The reversal of 7526428649 is 9468246257.

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 6894811225 + 631617424 = 83035^2 + 25132^2 .

It is a cyclic number.

It is not a de Polignac number, because 7526428649 - 2²⁴ = 7509651433 is a prime.

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 7526428649.

It is not an unprimeable number, because it can be changed into a prime (7526428643) 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 3 ways as a sum of consecutive naturals, for example, 221365532 + ... + 221365565.

It is an arithmetic number, because the mean of its divisors is an integer number (1992289941).

Almost surely, 2^7526428649 is an apocalyptic number.

It is an amenable number.

7526428649 is a deficient number, since it is larger than the sum of its proper divisors (442731115).

7526428649 is a wasteful number, since it uses less digits than its factorization.

7526428649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 442731114.

The product of its digits is 5806080, while the sum is 53.

The square root of 7526428649 is about 86754.9920696210. The cubic root of 7526428649 is about 1959.7303399145.

The spelling of 7526428649 in words is "seven billion, five hundred twenty-six million, four hundred twenty-eight thousand, six hundred forty-nine".