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30861416690 = 25132179108947
BaseRepresentation
bin11100101111011110…
…111101100011110010
32221122210012101220222
4130233132331203302
51001201010313230
622102203133042
72141526466526
oct345736754362
987583171828
1030861416690
11120a7513155
125b93514182
132baa99ca10
1416ca9ddd86
15c095836e5
hex72f7bd8f2

30861416690 has 32 divisors (see below), whose sum is σ = 59851673280. Its totient is φ = 11389650624.

The previous prime is 30861416647. The next prime is 30861416713. The reversal of 30861416690 is 9661416803.

It is a happy number.

It is a super-2 number, since 2×308614166902 (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 228797 + ... + 337743.

It is an arithmetic number, because the mean of its divisors is an integer number (1870364790).

Almost surely, 230861416690 is an apocalyptic number.

30861416690 is a deficient number, since it is larger than the sum of its proper divisors (28990256590).

30861416690 is a wasteful number, since it uses less digits than its factorization.

30861416690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111146.

The product of its (nonzero) digits is 186624, while the sum is 44.

The spelling of 30861416690 in words is "thirty billion, eight hundred sixty-one million, four hundred sixteen thousand, six hundred ninety".

Divisors: 1 2 5 10 13 26 65 130 2179 4358 10895 21790 28327 56654 108947 141635 217894 283270 544735 1089470 1416311 2832622 7081555 14163110 237395513 474791026 1186977565 2373955130 3086141669 6172283338 15430708345 30861416690