6722257545 has 48 divisors (see below), whose sum is σ = 11727977040. Its totient is φ = 3561887232.

The previous prime is 6722257543. The next prime is 6722257561. The reversal of 6722257545 is 5457522276.

6722257545 is a `hidden beast` number, since 6 + 72 + 2 + 2 + 575 + 4 + 5 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 900720144 + 5821537401 = 30012^2 + 76299^2 .

It is not a de Polignac number, because 6722257545 - 2¹ = 6722257543 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 6722257545.

It is not an unprimeable number, because it can be changed into a prime (6722257543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6741987 + ... + 6742983.

It is an arithmetic number, because the mean of its divisors is an integer number (244332855).

Almost surely, 2^6722257545 is an apocalyptic number.

It is an amenable number.

6722257545 is a deficient number, since it is larger than the sum of its proper divisors (5005719495).

6722257545 is a wasteful number, since it uses less digits than its factorization.

6722257545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1834 (or 1831 counting only the distinct ones).

The product of its digits is 1176000, while the sum is 45.

The square root of 6722257545 is about 81989.3745859791. The cubic root of 6722257545 is about 1887.2888860558.

The spelling of 6722257545 in words is "six billion, seven hundred twenty-two million, two hundred fifty-seven thousand, five hundred forty-five".