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75980065 = 5710132143
BaseRepresentation
bin1001000011101…
…01110100100001
312021222012001111
410201311310201
5123422330230
611312303321
71611551140
oct441656441
9167865044
1075980065
1139985a47
1221541b41
1312983725
14a13b757
156a0c92a
hex4875d21

75980065 has 16 divisors (see below), whose sum is σ = 104352768. Its totient is φ = 52024896.

The previous prime is 75980053. The next prime is 75980071. The reversal of 75980065 is 56008957.

It is a happy number.

75980065 is nontrivially palindromic in base 4.

It is not a de Polignac number, because 75980065 - 25 = 75980033 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34384 + ... + 36526.

It is an arithmetic number, because the mean of its divisors is an integer number (6522048).

Almost surely, 275980065 is an apocalyptic number.

It is an amenable number.

75980065 is a deficient number, since it is larger than the sum of its proper divisors (28372703).

75980065 is a wasteful number, since it uses less digits than its factorization.

75980065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3168.

The product of its (nonzero) digits is 75600, while the sum is 40.

The square root of 75980065 is about 8716.6544614319. The cubic root of 75980065 is about 423.5453195977.

The spelling of 75980065 in words is "seventy-five million, nine hundred eighty thousand, sixty-five".

Divisors: 1 5 7 35 1013 2143 5065 7091 10715 15001 35455 75005 2170859 10854295 15196013 75980065