7871727064 has 8 divisors (see below), whose sum is σ = 14759488260. Its totient is φ = 3935863528.

The previous prime is 7871727043. The next prime is 7871727133. The reversal of 7871727064 is 4607271787.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×7871727064² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 7871726999 and 7871727017.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 491982934 + ... + 491982949.

Almost surely, 2^7871727064 is an apocalyptic number.

It is an amenable number.

7871727064 is a deficient number, since it is larger than the sum of its proper divisors (6887761196).

7871727064 is a wasteful number, since it uses less digits than its factorization.

7871727064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 983965889 (or 983965885 counting only the distinct ones).

The product of its (nonzero) digits is 921984, while the sum is 49.

The square root of 7871727064 is about 88722.7539247965. The cubic root of 7871727064 is about 1989.2529424838.

The spelling of 7871727064 in words is "seven billion, eight hundred seventy-one million, seven hundred twenty-seven thousand, sixty-four".