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68717411415 = 3257121507797
BaseRepresentation
bin111111111111111000…
…000111110001010111
320120101000221012002200
4333333320013301113
52111213124131130
651322432335543
74651611234222
oct777770076127
9216330835080
1068717411415
1127163207304
12113993a45b3
1366317c77b3
14347c5485b9
151bc2c0e760
hexfffe07c57

68717411415 has 24 divisors (see below), whose sum is σ = 120787793568. Its totient is φ = 36133097280.

The previous prime is 68717411311. The next prime is 68717411447. The reversal of 68717411415 is 51411471786.

68717411415 is a `hidden beast` number, since 68 + 7 + 174 + 1 + 1 + 415 = 666.

It is not a de Polignac number, because 68717411415 - 28 = 68717411159 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10750704 + ... + 10757093.

It is an arithmetic number, because the mean of its divisors is an integer number (5032824732).

Almost surely, 268717411415 is an apocalyptic number.

68717411415 is a deficient number, since it is larger than the sum of its proper divisors (52070382153).

68717411415 is a wasteful number, since it uses less digits than its factorization.

68717411415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21507879 (or 21507876 counting only the distinct ones).

The product of its digits is 188160, while the sum is 45.

The spelling of 68717411415 in words is "sixty-eight billion, seven hundred seventeen million, four hundred eleven thousand, four hundred fifteen".

Divisors: 1 3 5 9 15 45 71 213 355 639 1065 3195 21507797 64523391 107538985 193570173 322616955 967850865 1527053587 4581160761 7635267935 13743482283 22905803805 68717411415