7785228481 has 4 divisors (see below), whose sum is σ = 7786046464. Its totient is φ = 7784410500.

The previous prime is 7785228463. The next prime is 7785228487. The reversal of 7785228481 is 1848225877.

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 7785228481 - 2¹¹ = 7785226433 is a prime.

It is a super-2 number, since 2×7785228481² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7785228487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 394545 + ... + 413806.

It is an arithmetic number, because the mean of its divisors is an integer number (1946511616).

Almost surely, 2^7785228481 is an apocalyptic number.

It is an amenable number.

7785228481 is a deficient number, since it is larger than the sum of its proper divisors (817983).

7785228481 is an equidigital number, since it uses as much as digits as its factorization.

7785228481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 817982.

The product of its digits is 2007040, while the sum is 52.

The square root of 7785228481 is about 88233.9417741268. The cubic root of 7785228481 is about 1981.9397785108.

The spelling of 7785228481 in words is "seven billion, seven hundred eighty-five million, two hundred twenty-eight thousand, four hundred eighty-one".