8220765437 has 4 divisors (see below), whose sum is σ = 8257630080. Its totient is φ = 8183900796.

The previous prime is 8220765407. The next prime is 8220765451. The reversal of 8220765437 is 7345670228.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8220765437 - 2²² = 8216571133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8220765407) 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, 18431987 + ... + 18432432.

It is an arithmetic number, because the mean of its divisors is an integer number (2064407520).

Almost surely, 2^8220765437 is an apocalyptic number.

It is an amenable number.

8220765437 is a deficient number, since it is larger than the sum of its proper divisors (36864643).

8220765437 is a wasteful number, since it uses less digits than its factorization.

8220765437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36864642.

The product of its (nonzero) digits is 564480, while the sum is 44.

The square root of 8220765437 is about 90668.4368289208. The cubic root of 8220765437 is about 2018.2304403664.

The spelling of 8220765437 in words is "eight billion, two hundred twenty million, seven hundred sixty-five thousand, four hundred thirty-seven".