7682785321 has 4 divisors (see below), whose sum is σ = 7753269700. Its totient is φ = 7612300944.

The previous prime is 7682785307. The next prime is 7682785373. The reversal of 7682785321 is 1235872867.

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 4346105625 + 3336679696 = 65925^2 + 57764^2 .

It is a cyclic number.

It is not a de Polignac number, because 7682785321 - 2¹⁹ = 7682261033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7682785921) 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, 35242026 + ... + 35242243.

It is an arithmetic number, because the mean of its divisors is an integer number (1938317425).

Almost surely, 2^7682785321 is an apocalyptic number.

It is an amenable number.

7682785321 is a deficient number, since it is larger than the sum of its proper divisors (70484379).

7682785321 is a wasteful number, since it uses less digits than its factorization.

7682785321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70484378.

The product of its digits is 1128960, while the sum is 49.

The square root of 7682785321 is about 87651.4992512963. The cubic root of 7682785321 is about 1973.2081442570.

The spelling of 7682785321 in words is "seven billion, six hundred eighty-two million, seven hundred eighty-five thousand, three hundred twenty-one".