7812540789 has 16 divisors (see below), whose sum is σ = 10526484864. Its totient is φ = 5153544000.

The previous prime is 7812540781. The next prime is 7812540803. The reversal of 7812540789 is 9870452187.

It is not a de Polignac number, because 7812540789 - 2³ = 7812540781 is a prime.

It is a super-2 number, since 2×7812540789² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7812540781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 533019 + ... + 547479.

It is an arithmetic number, because the mean of its divisors is an integer number (657905304).

Almost surely, 2^7812540789 is an apocalyptic number.

It is an amenable number.

7812540789 is a deficient number, since it is larger than the sum of its proper divisors (2713944075).

7812540789 is a wasteful number, since it uses less digits than its factorization.

7812540789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16348.

The product of its (nonzero) digits is 1128960, while the sum is 51.

The square root of 7812540789 is about 88388.5783854453. The cubic root of 7812540789 is about 1984.2547682077.

The spelling of 7812540789 in words is "seven billion, eight hundred twelve million, five hundred forty thousand, seven hundred eighty-nine".