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64685545 = 52343103127
BaseRepresentation
bin1111011011000…
…0010111101001
311111201100212221
43312300113221
5113024414140
610230234041
71413550411
oct366602751
9144640787
1064685545
1133571231
12197b5921
131052a892
14883b641
155a2b14a
hex3db05e9

64685545 has 32 divisors (see below), whose sum is σ = 84344832. Its totient is φ = 47500992.

The previous prime is 64685539. The next prime is 64685567. The reversal of 64685545 is 54558646.

It is a 4-Lehmer number, since φ(64685545) divides (64685545-1)4.

It is a cyclic number.

It is not a de Polignac number, because 64685545 - 25 = 64685513 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 509272 + ... + 509398.

It is an arithmetic number, because the mean of its divisors is an integer number (2635776).

It is a Poulet number, since it divides 264685544-1.

Almost surely, 264685545 is an apocalyptic number.

It is an amenable number.

64685545 is a deficient number, since it is larger than the sum of its proper divisors (19659287).

64685545 is a wasteful number, since it uses less digits than its factorization.

64685545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301.

The product of its digits is 576000, while the sum is 43.

The square root of 64685545 is about 8042.7324336944. The cubic root of 64685545 is about 401.4231493598.

The spelling of 64685545 in words is "sixty-four million, six hundred eighty-five thousand, five hundred forty-five".

Divisors: 1 5 23 43 103 115 127 215 515 635 989 2369 2921 4429 4945 5461 11845 13081 14605 22145 27305 65405 101867 125603 300863 509335 562483 628015 1504315 2812415 12937109 64685545