7851343063864 has 64 divisors (see below), whose sum is σ = 15078780288000. Its totient is φ = 3831608327040.

The previous prime is 7851343063859. The next prime is 7851343063913. The reversal of 7851343063864 is 4683603431587.

It is a super-2 number, since 2×7851343063864² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 7851343063799 and 7851343063808.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 37064202 + ... + 37275430.

It is an arithmetic number, because the mean of its divisors is an integer number (235605942000).

Almost surely, 2^{7851343063864} is an apocalyptic number.

It is an amenable number.

7851343063864 is a deficient number, since it is larger than the sum of its proper divisors (7227437224136).

7851343063864 is a wasteful number, since it uses less digits than its factorization.

7851343063864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211988 (or 211984 counting only the distinct ones).

The product of its (nonzero) digits is 34836480, while the sum is 58.

The spelling of 7851343063864 in words is "seven trillion, eight hundred fifty-one billion, three hundred forty-three million, sixty-three thousand, eight hundred sixty-four".