7830645691986 has 64 divisors (see below), whose sum is σ = 18915147216000. Its totient is φ = 2386911388608.

The previous prime is 7830645691951. The next prime is 7830645691987. The reversal of 7830645691986 is 6891965460387.

7830645691986 is a `hidden beast` number, since 7 + 8 + 3 + 0 + 6 + 456 + 91 + 9 + 86 = 666.

It is a super-2 number, since 2×7830645691986² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7830645691987) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 52049961 + ... + 52200188.

It is an arithmetic number, because the mean of its divisors is an integer number (295549175250).

Almost surely, 2^{7830645691986} is an apocalyptic number.

7830645691986 is an abundant number, since it is smaller than the sum of its proper divisors (11084501524014).

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

7830645691986 is a wasteful number, since it uses less digits than its factorization.

7830645691986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104250280 (or 104250274 counting only the distinct ones).

The product of its (nonzero) digits is 470292480, while the sum is 72.

The spelling of 7830645691986 in words is "seven trillion, eight hundred thirty billion, six hundred forty-five million, six hundred ninety-one thousand, nine hundred eighty-six".