7827181620 has 48 divisors (see below), whose sum is σ = 22055728128. Its totient is φ = 2073951360.

The previous prime is 7827181591. The next prime is 7827181627. The reversal of 7827181620 is 261817287.

It is a super-2 number, since 2×7827181620² (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 (7827181627) 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 15 ways as a sum of consecutive naturals, for example, 406036 + ... + 424875.

It is an arithmetic number, because the mean of its divisors is an integer number (459494336).

Almost surely, 2^7827181620 is an apocalyptic number.

It is an amenable number.

7827181620 is an abundant number, since it is smaller than the sum of its proper divisors (14228546508).

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

7827181620 is a wasteful number, since it uses less digits than its factorization.

7827181620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 831080 (or 831078 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 42.

The square root of 7827181620 is about 88471.3604507131. The cubic root of 7827181620 is about 1985.4935035068.

The spelling of 7827181620 in words is "seven billion, eight hundred twenty-seven million, one hundred eighty-one thousand, six hundred twenty".