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8172137506 = 213314312981
BaseRepresentation
bin1111001110001100…
…01110110000100010
3210002112022121011111
413213012032300202
5113214031400011
63430525133534
7406341010531
oct74706166042
923075277144
108172137506
113513a5a955
1217009ba2aa
13a030c3330
145774b6318
1532c69e121
hex1e718ec22

8172137506 has 8 divisors (see below), whose sum is σ = 13201145244. Its totient is φ = 3771755760.

The previous prime is 8172137489. The next prime is 8172137539. The reversal of 8172137506 is 6057312718.

It can be written as a sum of positive squares in 2 ways, for example, as 7206481881 + 965655625 = 84891^2 + 31075^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 157156465 + ... + 157156516.

Almost surely, 28172137506 is an apocalyptic number.

8172137506 is a deficient number, since it is larger than the sum of its proper divisors (5029007738).

8172137506 is a wasteful number, since it uses less digits than its factorization.

8172137506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314312996.

The product of its (nonzero) digits is 70560, while the sum is 40.

The square root of 8172137506 is about 90399.8755861976. The cubic root of 8172137506 is about 2014.2431181715.

The spelling of 8172137506 in words is "eight billion, one hundred seventy-two million, one hundred thirty-seven thousand, five hundred six".

Divisors: 1 2 13 26 314312981 628625962 4086068753 8172137506