7531790645 has 4 divisors (see below), whose sum is σ = 9038148780. Its totient is φ = 6025432512.

The previous prime is 7531790587. The next prime is 7531790647. The reversal of 7531790645 is 5460971357.

It is a happy number.

7531790645 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5460971357 = 929 ⋅5878333.

It can be written as a sum of positive squares in 2 ways, for example, as 5665723441 + 1866067204 = 75271^2 + 43198^2 .

It is a cyclic number.

It is not a de Polignac number, because 7531790645 - 2¹⁶ = 7531725109 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7531790645.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7531790647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 753179060 + ... + 753179069.

It is an arithmetic number, because the mean of its divisors is an integer number (2259537195).

Almost surely, 2^7531790645 is an apocalyptic number.

It is an amenable number.

7531790645 is a deficient number, since it is larger than the sum of its proper divisors (1506358135).

7531790645 is a wasteful number, since it uses less digits than its factorization.

7531790645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1506358134.

The product of its (nonzero) digits is 793800, while the sum is 47.

The square root of 7531790645 is about 86785.8896653137. The cubic root of 7531790645 is about 1960.1956146739.

The spelling of 7531790645 in words is "seven billion, five hundred thirty-one million, seven hundred ninety thousand, six hundred forty-five".