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64678743 = 34798503
BaseRepresentation
bin1111011010111…
…0101101010111
311111201000120000
43312232231113
5113024204433
610230142343
71413521523
oct366565527
9144630500
1064678743
1133567108
12197b19b3
131052775c
148838d83
155a29113
hex3daeb57

64678743 has 10 divisors (see below), whose sum is σ = 96618984. Its totient is φ = 43119108.

The previous prime is 64678723. The next prime is 64678759. The reversal of 64678743 is 34787646.

It is not a de Polignac number, because 64678743 - 28 = 64678487 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64678723) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 399171 + ... + 399332.

Almost surely, 264678743 is an apocalyptic number.

64678743 is a deficient number, since it is larger than the sum of its proper divisors (31940241).

64678743 is an equidigital number, since it uses as much as digits as its factorization.

64678743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 798515 (or 798506 counting only the distinct ones).

The product of its digits is 677376, while the sum is 45.

The square root of 64678743 is about 8042.3095563401. The cubic root of 64678743 is about 401.4090783337.

The spelling of 64678743 in words is "sixty-four million, six hundred seventy-eight thousand, seven hundred forty-three".

Divisors: 1 3 9 27 81 798503 2395509 7186527 21559581 64678743