7821425630 has 8 divisors (see below), whose sum is σ = 14078566152. Its totient is φ = 3128570248.

The previous prime is 7821425629. The next prime is 7821425663. The reversal of 7821425630 is 365241287.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×7821425630² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 391071272 + ... + 391071291.

It is an arithmetic number, because the mean of its divisors is an integer number (1759820769).

Almost surely, 2^7821425630 is an apocalyptic number.

7821425630 is a deficient number, since it is larger than the sum of its proper divisors (6257140522).

7821425630 is a wasteful number, since it uses less digits than its factorization.

7821425630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 782142570.

The product of its (nonzero) digits is 80640, while the sum is 38.

The square root of 7821425630 is about 88438.8242233014. The cubic root of 7821425630 is about 1985.0066836060.

The spelling of 7821425630 in words is "seven billion, eight hundred twenty-one million, four hundred twenty-five thousand, six hundred thirty".