7646218420 has 12 divisors (see below), whose sum is σ = 16057058724. Its totient is φ = 3058487360.

The previous prime is 7646218409. The next prime is 7646218429. The reversal of 7646218420 is 248126467.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1174981284 + 6471237136 = 34278^2 + 80444^2 .

It is a super-2 number, since 2×7646218420² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7646218429) 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 3 ways as a sum of consecutive naturals, for example, 191155441 + ... + 191155480.

It is an arithmetic number, because the mean of its divisors is an integer number (1338088227).

Almost surely, 2^7646218420 is an apocalyptic number.

It is an amenable number.

7646218420 is an abundant number, since it is smaller than the sum of its proper divisors (8410840304).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7646218420 is a wasteful number, since it uses less digits than its factorization.

7646218420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382310930 (or 382310928 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 40.

The square root of 7646218420 is about 87442.6578964752. The cubic root of 7646218420 is about 1970.0726110644.

The spelling of 7646218420 in words is "seven billion, six hundred forty-six million, two hundred eighteen thousand, four hundred twenty".