7718225651 has 4 divisors (see below), whose sum is σ = 7967200704. Its totient is φ = 7469250600.

The previous prime is 7718225639. The next prime is 7718225659. The reversal of 7718225651 is 1565228177.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 7718225651 - 2¹⁸ = 7717963507 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7718225659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 124487480 + ... + 124487541.

It is an arithmetic number, because the mean of its divisors is an integer number (1991800176).

Almost surely, 2^7718225651 is an apocalyptic number.

7718225651 is a deficient number, since it is larger than the sum of its proper divisors (248975053).

7718225651 is a wasteful number, since it uses less digits than its factorization.

7718225651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248975052.

The product of its digits is 235200, while the sum is 44.

The square root of 7718225651 is about 87853.4327786911. The cubic root of 7718225651 is about 1976.2375964628.

The spelling of 7718225651 in words is "seven billion, seven hundred eighteen million, two hundred twenty-five thousand, six hundred fifty-one".