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16389786542 = 2197103940037
BaseRepresentation
bin11110100001110100…
…00100101110101110
31120022020021102102012
433100322010232232
5232031241132132
611310202001222
71120103613143
oct172072045656
946266242365
1016389786542
116a50675238
123214aa6212
13171275ca5c
14b16a383ca
1565dd3d0b2
hex3d0e84bae

16389786542 has 16 divisors (see below), whose sum is σ = 24733874880. Its totient is φ = 8145244128.

The previous prime is 16389786503. The next prime is 16389786551. The reversal of 16389786542 is 24568798361.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 389348 + ... + 429384.

It is an arithmetic number, because the mean of its divisors is an integer number (1545867180).

Almost surely, 216389786542 is an apocalyptic number.

16389786542 is a deficient number, since it is larger than the sum of its proper divisors (8344088338).

16389786542 is a wasteful number, since it uses less digits than its factorization.

16389786542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41275.

The product of its digits is 17418240, while the sum is 59.

The spelling of 16389786542 in words is "sixteen billion, three hundred eighty-nine million, seven hundred eighty-six thousand, five hundred forty-two".

Divisors: 1 2 197 394 1039 2078 40037 80074 204683 409366 7887289 15774578 41598443 83196886 8194893271 16389786542