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80106761 = 713218663
BaseRepresentation
bin1001100011001…
…01010100001001
312120201211211002
410301211110021
5131001404021
611540544345
71661616260
oct461452411
9176654732
1080106761
1141244439
12229b20b5
1313799b67
14a8d35d7
15707550b
hex4c65509

80106761 has 8 divisors (see below), whose sum is σ = 91630464. Its totient is φ = 68603040.

The previous prime is 80106731. The next prime is 80106779. The reversal of 80106761 is 16760108.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-80106761 is a prime.

It is a super-2 number, since 2×801067612 = 12834186315822242, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (80106731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4916 + ... + 13578.

It is an arithmetic number, because the mean of its divisors is an integer number (11453808).

Almost surely, 280106761 is an apocalyptic number.

It is an amenable number.

80106761 is a deficient number, since it is larger than the sum of its proper divisors (11523703).

80106761 is a wasteful number, since it uses less digits than its factorization.

80106761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9991.

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 80106761 is about 8950.2380415272. The cubic root of 80106761 is about 431.0785274737.

Adding to 80106761 its reverse (16760108), we get a palindrome (96866869).

The spelling of 80106761 in words is "eighty million, one hundred six thousand, seven hundred sixty-one".

Divisors: 1 7 1321 8663 9247 60641 11443823 80106761